Question

select the part whose main job is to break down waste and worn - out cell parts. lysosome chromosomes nucleus cytoplasm

Explanation:

Lysosomes contain digestive enzymes. These enzymes break down waste materials, foreign substances, and worn - out cell parts (such as old organelles). Chromosomes carry genetic information. The nucleus is the control center of the cell that houses the chromosomes (in eukaryotes). The cytoplasm is the jelly - like substance within the cell where many cellular processes occur, but it does not have the specific function of breaking down waste and worn - out cell parts like lysosomes.

Answer:

lysosome