Question

___ is the chief source to all forms of energies.

Answer 1

The sun is called the ultimate source of energy because:

1. It is the primary source of energy for the earth.
2. With the help of solar energy, all green plants(producers) produce food by the process of photosynthesis.
3. In turn, animals eat plants and use that same chemical energy for all their activities.

Thus, Sun is the chief source of all forms of energy.