Question

why sun is the ultimate resource of energy for all living organisms ?​

Answer 1

Answer:

We know that the plants use solar energy to make their food. The herbivores animals depend upon the plants for food. Animals (carnivores) that do not eat plants depend upon the herbivores animals. Therefore, all of the living organisms directly or indirectly receive their energy from the sun

Answer 2

Answer:

The sun is called the ultimate source of energy because it is the source of almost all energies of the earth. Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.