Answer:
The correct answer is "heat".
Step-by-step explanation:
The missing options of this question are:
A. sound.
B. waste.
C. heat.
D. light.
The correct answer is option C. "heat".
Organisms use catabolic reactions to break down food and obtain the energy they need to live, mainly in the form of adenosine triphosphate (ATP). However, not all the energy from the reactions can be used by the organisms, as some of the energy is lost in the form of heat. Actually, for this characteristic, catabolic reactions are also known as exothermic reactions in organisms.