Answer: The Answer is A.) Burning of fossil fuels
Explanation:
The greater the amount of active transport carried out by a cell, the greater the amount of mitochondria would be found in the cell.
Active transport uses energy. Mitochondria undergoes aerobic respiration to release large amounts of energy. If the cell is found to be lacking in energy needed for active transport, the cell would adapt by synthesizing more mitochondrion to ensure that it's demand of energy is met.
Answer
The answer is watershed and that is an area that catches all the rain and snow.
Solar energy.
This is because the solar energy arrives and is trapped as radiation and heat.