Question

what is energy primarily described as?
a form of light
the ability to perform labor
a type of matter
a chemical reaction

Explanation:

Energy is defined as the capacity to do work. Work is often described as labor in a general sense. Light is a form of energy but not the primary description. Matter has mass and occupies space, which energy does not. A chemical reaction involves transformation of substances and is not the primary description of energy.

Answer:

The ability to perform labor