What is energy? please answer i need help

Energy is the ability to do work. Energy comes in different forms: Heat (thermal) Light (radiant) Motion (kinetic) Electrical ; Chemical ; Nuclear energy ; Gravitational; People use energy for everything from walking to sending astronauts into space. There are two types of energy: Stored (potential) energy ; Working (kinetic) energy

Explanation:

the strength and vitality required for sustained physical or mental activity.

power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.

Explanation:

answer(c) carved on a babylonian clay tablet that showed earth as a flat circular disk;