Question

What is the connection between the sun and a piece of coal?

Answer 1

They both are the sources of energy.Sun gives energy in form of light.

Answer 2

The sun and a piece of coal ,both are sources of energy.

There are some connections in the sun and a piece of coal too.

Coals are produced from the trees which went to the underground,many ages ago.

The energy stored in the trees in the chemical form ,converts into the coal during long conversion process in the underground.And the source of the energy in plants,is the sun.