Which factor is biotic?

• A. Temperature
• B. Predation
• C. Water
• D. Sunlight

Answer: (B)

Biotic factors are the living parts of an ecosystem and the interactions among living things. Predation fits this because it involves living organisms—a predator hunting and feeding on another living organism. The other options are abiotic factors, meaning non-living environmental conditions like temperature, water, and sunlight that influence organisms but are not themselves living. So predation is the biotic factor here, since it depends on living beings and their interactions.