Question

which best defines energy?
a type of wave that carries energy through space, where there is almost no matter
a disturbance that carries energy form one place to another through matter and space
the ability to do work
pressing to make more compact

Explanation:

Energy is defined in physics as the ability to do work. The first option describes electromagnetic waves. The second describes a wave in general. The fourth is about compression, not energy.

Answer:

the ability to do work