Sugar changes into energy in

a. golgi bodies

b. mitochondria

c. nucleus

d. nucleolus

Mithochondria.

Explanation:

You may have heard the phrase "mithochondria is the powerhouse of the cell". This is because, embedded in the inner mithochondrial membrane, there is a protein that is capable of creating ATP by using the energy that results from dissipating the chemoelectric potencial between the intermembrane space and the mithochondrial matrix, by bombing protons (that came from the degradation of sugar) to the mithochondrial matrix.