The muscles most needed for butterfly swimming are the chest muscles (pectoralis major), shoulder muscles (deltoids), upper back muscles (latissimus dorsi), and core muscles (abdominals and lower back). These muscles are essential for generating power and propulsion during the butterfly stroke. Additionally, strong leg muscles (quadriceps and hamstrings) are also important for kicking and maintaining a streamlined body position in the water. Regular strength training focusing on these muscle groups can help improve performance in butterfly swimming. **

Abstract refers to something that is conceptual or theoretical rather than concrete or specific. It often involves ideas or concepts that are not tangible or easily defined. In art, an abstract piece may not represent any recognizable objects or scenes, instead focusing on shapes, colors, and forms. Overall, abstract can be used to describe things that are not easily understood or defined in a straightforward manner. **

Abstract nouns are nouns that represent ideas, concepts, or emotions rather than physical objects. They cannot be perceived by the five senses and are typically intangible. Examples of abstract nouns include love, happiness, freedom, and justice. These nouns often require context or explanation to understand their meaning. **

Abstract expressionism is a post-World War II art movement that emerged in the United States in the 1940s. It is characterized by the use of abstract forms, expressive brushwork, and a focus on conveying emotions and feelings rather than representing the physical world. Artists associated with abstract expressionism include Jackson Pollock, Willem de Kooning, and Mark Rothko. The movement is often seen as a reaction against traditional artistic conventions and a celebration of individual creativity and freedom. **

Abstract painting is a style of art that does not attempt to represent an accurate depiction of visual reality. Instead, it focuses on the use of color, shape, form, and gestural marks to create a composition that is non-representational and often non-objective. Abstract paintings can evoke emotions, ideas, and sensations through the use of non-representational elements, allowing for a more subjective and personal interpretation by the viewer. This style of painting emerged in the early 20th century and has since become a significant and influential movement in the art world. **

In Islam, the permissibility of abstract drawings is a matter of differing opinions among scholars. Some scholars consider abstract drawings to be permissible as long as they do not depict anything that is prohibited in Islam, such as nudity or idolatry. Other scholars may consider all forms of visual representation to be haram, especially if they are used for idolatrous purposes. It is important for individuals to seek guidance from knowledgeable scholars and to consider the intention and context behind the creation and use of abstract drawings. **

The muscles most needed for the butterfly stroke are the chest muscles (pectoralis major), shoulder muscles (deltoids), upper back muscles (latissimus dorsi), and core muscles (abdominals). These muscles work together to provide the power and propulsion needed to execute the butterfly stroke effectively. Additionally, strong leg muscles (quadriceps and hamstrings) are also important for kicking and maintaining a streamlined body position in the water. **

The butterfly stroke primarily relies on the muscles of the upper body, including the chest, shoulders, and arms. The chest muscles (pectoralis major) are important for the powerful arm movements, while the shoulder muscles (deltoids) help with the circular motion of the arms. The arm muscles, particularly the triceps and biceps, are crucial for propelling the body forward in the water. Additionally, the core muscles play a significant role in stabilizing the body and providing the necessary strength for the undulating body movement in the butterfly stroke. **