- A The particular surface colour or visual appearance of the island itself overall
- B Island size and distance from the mainland (immigration and extinction balance)
- C Mainly the surrounding ocean water temperature near the island in question
- D Mainly the level of human settlement activity present on the island itself
Correct answer: B. Island size and distance from the mainland (immigration and extinction balance)
Explanation: Island biogeography (MacArthur and Wilson): species richness is equilibrium between immigration rate (increases with proximity to mainland) and extinction rate (decreases with island size).
Concept context
Levels of biodiversity, species richness patterns, threats (HIPPO), and conservation strategies. Always in NEET.