SSC Stenographer 2022 PYQ — Question 117

The correct answer is option 2 i.e. Sunlight

• The primary source of energy in an ecosystem is the sun.
• Solar energy is captured by green plants, algae, and some bacteria through the process of photosynthesis.
• These photosynthetic organisms convert sunlight into chemical energy in the form of glucose and other organic molecules.
• This energy then flows through the ecosystem as organisms consume plants or other organisms, transferring the stored energy from one trophic level to another in a food web.
• Solar energy is the foundation of nearly all life on Earth and drives the Earth's ecosystems.