Question

what is the main function of the lysosome in an animal cell?

to fill the space between the cell membrane and the nucleus

to break down waste

to package proteins and other substances and send them to different parts of the cell

to control which substances enter and leave the cell

Explanation:

Lysosomes are membrane - bound organelles in animal cells. They contain digestive enzymes. These enzymes are used to break down various substances such as worn - out organelles, food particles that the cell has engulfed (phagocytosis), and waste products.
The option "to fill the space between the cell membrane and the nucleus" is incorrect as that is mainly the function of the cytoplasm. The option "to package proteins and other substances and send them to different parts of the cell" is the function of the Golgi apparatus. The option "to control which substances enter and leave the cell" is the function of the cell membrane.

Answer:

to break down waste