Question

select the part whose main job is to send instructions to different parts of the cell. cytoplasm nucleus centrosome mitochondria

Explanation:

The nucleus contains the cell's genetic material (DNA). It sends instructions in the form of RNA to different parts of the cell for processes like protein - synthesis. The cytoplasm is the jelly - like substance where cell organelles are suspended. The centrosome is involved in cell division. Mitochondria are the power - houses of the cell, producing energy.

Answer:

nucleus