Question

what is the source of all the energy needed to sustain life? the sun oxygen carbon dioxide water

Explanation:

The sun is the primary source of energy for life on Earth. Through processes like photosynthesis, plants convert solar energy into chemical energy. This energy then flows through food chains and food webs, supporting all forms of life. Oxygen is used in respiration but is not the energy source. Carbon dioxide is used in photosynthesis as a raw material, not an energy source. Water is essential for life processes but is not an energy source.

Answer:

A. The sun