Question

what is the main function of cytoplasm in an animal cell? to control which substances enter and leave the cell; to break down waste and worn-out cell parts; to fill the space between the cell membrane and the nucleus; to break down sugar and release energy that the cell can use

Explanation:

1. Analyze each option:

• Option 1: Controlling substances entering/leaving is the cell membrane's function, not cytoplasm.
• Option 2: Breaking down waste and worn - out parts is lysosomes' role, not cytoplasm.
• Option 3: Cytoplasm is a jelly - like substance that fills the space between the cell membrane and the nucleus, and it also holds organelles and is the site of many cellular activities. This matches the function of cytoplasm.
• Option 4: Breaking down sugar to release energy is mitochondria's function (cellular respiration), not cytoplasm.

Answer:

to fill the space between the cell membrane and the nucleus