in which level does a muscle belong?

Brief Explanations:

Muscles are made up of muscle tissues. A group of similar cells forms a tissue. Muscles are considered an organ - level structure as multiple tissues work together to perform a specific function. In the biological hierarchy, after cells form tissues, tissues combine to form organs. Muscles fit this organ - level description as they are composed of different types of tissues like muscle tissue, connective tissue, etc. and perform functions such as movement.

Answer:

Organ