Respiration is the process in which organisms break down food to release . a.
energy
c.
sugar
b.
nutrients
d.
oxygen

Sugar

Explanation:

I am not completely sure but correct me if I am wrong. Through the process of cellular respiration, the energy in food is converted into energy that can be used by the body's cells. During cellular respiration, glucose and oxygen are converted into carbon dioxide and water, and the energy is transferred to ATP.

Hope it helps

The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.

Explanation: