Which of the following is a biotic limiting factor?

• A. Abiotic limiting factor
• B. Sunlight
• C. Predation
• D. Population density

Answer: (C)

Biotic factors come from living things in an ecosystem. Predation fits here because it’s a living interaction—predators (living) limit the prey population by feeding on them. This direct, biological interaction can keep populations from growing too large.

Abiotic factors are nonliving parts of the environment, like sunlight, temperature, or rainfall, which limit growth through energy, heat, or moisture availability. Population density is a measure of how many individuals are in an area, and while high density can influence survival and reproduction, it’s not a living factor itself.

So predation is the biotic limiting factor.