Question

The ultimate source of energy for most organisms is.

Answer 1

[AI-generated answer — Bot GPT 3.5]

the sun.

The sun provides light and warmth, which drives photosynthesis in plants and other autotrophic organisms. These organisms convert solar energy into chemical energy in the form of glucose, which is then consumed by heterotrophic organisms to obtain energy for their own survival and growth. In this way, the sun is the primary source of energy for almost all living things on Earth.