Q:Fact 1: Chemical weathering causes iron in rock to oxidize. Fact 2: When iron oxidizes it produces iron oxide, more commonly referred to as rust. Given the two facts above, answer the question "Rust of iron in rocks is a direct result of " with the following options: - solar heating - high speed fall from space - Chemical energy - The area was once underwater - permineralization - Temperature - volcanic ejection - chemical weathering
A:
chemical weathering