Question

Which is the most important source of energy used for lighting and power
​

Answer 1

Answer:

The Sun

Explanation: Energy from the sun( or solar energy) is used for harnessing electrical energy for lighting and power.

Most importantly, it is a renewable source of energy.

Answer 2

Answer:

The most important source of energy used for lightning and power is Fossil Fuels energy.

If you look closely, fossil fuel is the fuel on which human is most dependent. So, Fossil Fuel is the answer

Hope it helps