Question

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

Explanation:

The sun is the ultimate source of energy for life on Earth. It provides light energy which is used by plants in photosynthesis to convert carbon dioxide and water into food (chemical energy). Oxygen is a by - product of photosynthesis. All other organisms, directly or indirectly, depend on the energy that originated from the sun.

Answer:

The sun