Question Detail
Question
_______ is life’s primary source of energy
Correct Answer
Option C is the correct answer.
Detailed Explanation
The ultimate source of energy for almost all life on Earth is sunlight. Plants, algae, and some bacteria capture this energy through photosynthesis. The energy from sunlight is then converted into chemical energy (like in food) that flows through ecosystems. ATP is the immediate, usable energy currency within a cell, but it is not the primary source from the environment.
Hint
Consider the beginning of most food chains and energy cycles on our planet.