What 2 thing body use for energy?

Answer 1

The energy "currency" of the human body is ATP (adenosine triphospate). Your body produces ATP in a variety of ways, and without getting into some heavy physiology, I'll put it like this:

Every cell in the human body needs two things: oxygen and glucose. The cells then use these two things to create large amounts of ATP using a process called "oxidative phosphorylation". When oxygen or glucose aren't available, you body tries other processes to produce ATP, but these other methods don't produce very much ATP - which is why you can't survive for long without oxygen or glucose! (You get glucose from food)

Answer 2

The body uses glucose and glycogen for energy. These two things are energy reserves the body creates through caloric intake. The glucose is easier assimilated than the glycogen for the body, therefore the body will use more glucose than glycogen.