What is the original source of the energy stored in fossil fuels?
plants
the Sun
air
water

Option B. the Sun

Explanation:

The original source of the energy stored in fossil fuels comes from the sun in the process of photosynthesis. In photosynthesis, ancient plants convert solar energy into the chemical energy and this energy is used when we burn fossil fuels. The ancient plants remain buried in the soil for thousands of years and use by human when extracted.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.