Question

Explain how sunlight is the primary source of energy for your own life.

Answer 1

It provides vitamin D

Answer 2

The sun provides the energy for plants which starts the whole food chain. 

the human body has to remain a certain temperature. 
The sun provides that heat. 

I have to drink. 
The sun evaporates water so it can be redistributed in the form of rain. 

Your life is set by the movement of the sun.

 It provides vitamin D

Hope this helps