Energy is defined as the ability to perform any work. It can be categorized into electrical, mechanical, gravitational, and heat energy.
The correct types of energy required to do work are:
Mechanical Energy
Electrical Energy
Gravitational Potential Energy
The flexing of an arm muscle requires mechanical energy. Mechanical energy is possessed by an object (arm) due to the movement or position. Thus, the flexing of the arm requires mechanicalenergy.
Electrical energy is defined as the movement of electrically charged particles. The transduction of neurons involves the passing of charges across a synapse. Thus, the movement of charges across the neurons creates an electrical charge.
Gravitational Potential energy is defined as the energy possessed by an object in a given position in a gravitational field. The ball on the top of the hill will possess gravitational potential energy due to which it will free fall from the hill's top.
To know more about types of energy, refer to the following link:
