The energy that powers most life on Earth originates from which source?

The energy that powers most life on Earth originates from which source?

• A. The Sun
• B. The Moon
• C. The Wind
• D. The Ocean

Answer: (A)

Energy for almost all living things starts with sunlight. Plants, algae, and some bacteria capture light and convert it into chemical energy stored in sugars through photosynthesis. This chemical energy then moves through the food web when other organisms eat those plants or each other, fueling growth, movement, and life processes. The Sun is the original source because it provides the light that drives this process. The Moon doesn’t supply energy for metabolism, though its gravity creates tides. Wind and ocean currents come from solar heating and the planet’s shape and rotation; they influence habitats and climate but aren’t the direct energy source that powers most life.

Energy for almost all living things starts with sunlight. Plants, algae, and some bacteria capture light and convert it into chemical energy stored in sugars through photosynthesis. This chemical energy then moves through the food web when other organisms eat those plants or each other, fueling growth, movement, and life processes. The Sun is the original source because it provides the light that drives this process. The Moon doesn’t supply energy for metabolism, though its gravity creates tides. Wind and ocean currents come from solar heating and the planet’s shape and rotation; they influence habitats and climate but aren’t the direct energy source that powers most life.