Question

Why is the sun considered as the prime source of heat energy ?​

Answer 1

Sun is considered as the primary source of energy because when it rises, it brings light and warmth to the Earth, which plants can use to photosynthesize, which animals can then eat the plant.

Answer 2

The Sun is the Ultimate Source of Energy. Every morning the sun rises, bringing light and heat to the earth, and every evening it sets. ... 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.