Answer:
Option A, Energy is released from molecules and is transferred to other molecules
Explanation:
In a cellular respiration, oxygen is taken in to break down glucose (carbohydrate) to release carbon dioxide, water and energy molecules.
The chemical equation of a cellular respiration is as follows -
[tex]C_6H_{12}O_6 + 6O_2 -----> 6CO_2 + 6H_2O + ATP[/tex]
The energy contained in glucose molecule is converted into another energy molecule (ATP) with the help of oxygen.
Hence, option A is correct.