- A Primarily defined by the total number of species present
- B Climate (temperature and precipitation patterns)
- C Primarily defined by altitude above sea level alone
- D Primarily defined by soil composition and type alone
Correct answer: B. Climate (temperature and precipitation patterns)
Explanation: Biomes are large-scale ecosystems characterized primarily by climate (temperature + precipitation patterns). Determines vegetation type and associated fauna.
Concept context
Ecosystems, food chains, energy flow, nutrient cycles, biodiversity, and conservation.