The food you eat.
nervous system
To make energy for their bodys, and to STAY ALIVE!!!
Ambot
Produces the bodys energy!
20%
thyroid gland .
Fat serves as an energy source for the body.
Our bodies need fat to porvide energy and to get all the vitamins we need.
Well... They build up a layer of fat which powers their bodys.
common sense please
Respiration supplies the body with oxygen, energy could be a byproduct because you need oxygen to perform tasks that create energy
The location of natural Resources and energy will affect the various types of economic activities that come with access to said resources.