pick from the following. (A). Chemical energy (B). High pressure (C). harmful substances (D). Greenhouse gasses (E). permineralization (F). Chemical weathering (G). Cold temperatures (H). Direct heat

Fact 1: Chemical weathering causes iron in rock to oxidize. Fact 2: When iron oxidizes, it rusts. Given the two facts above, what causes iron to rust?
Answer:
(F).