Question

select the part whose main job is to break down sugar and release energy that the cell can use. golgi chloroplast mitochondria smooth endoplasmic reticulum

Explanation:

Mitochondria are the power - houses of the cell. They perform cellular respiration, breaking down sugar (glucose) through a series of chemical reactions to release energy in the form of ATP that the cell can use. The Golgi apparatus is involved in modifying, sorting, and packaging proteins and lipids. Chloroplasts are involved in photosynthesis. The smooth endoplasmic reticulum is involved in lipid synthesis and detoxification.

Answer:

mitochondria