Pick from: -moves. -decreases. -gains. -survive. -increases. -migrate. -It expands. -varies.
Given those answer options, answer the question: Fact 1: Biodiversity generally increases from the poles to the equator. Fact 2: Biodiversity, on the whole, increases towards the equator and decreases towards the poles. Given the two facts above, what does biodiversity do towards the poles?
A:
decreases