Why do living organisms require a continuous intake of energy?

Question

Why do living organisms require a continuous intake of energy?

Answer 1

You do not intake energy, you produce energy using the body's chemistry to process fuel(food and water, energy sources).

Answer 2

To make biochemicals that build up life. Cells constantly die. We need to replenish those. Therefore, we need energy to make proteins, sugars, etc. Energy is used to build life, and maintain it.

Bottom life: We need to maintain life too!!!

Answer 3

Although catabolic processes (breaking down molecules to get the chemical energy) supposedly don't cost anything, there is always a net loss of energy in everything a cell does.  It will always be giving off energy in the form of heat (at the very least) and thus must replace it with new energy.  For humans, that means eating.  For plants, that means taking in light energy and carbon dioxide to form new molecules they can break down later.