The answer is <em>C.) Rock</em><em />
An abiotic factor is anything that is not living. A snail, snake, and tree are all living factors of the environment, so that leaves us with only one choice. The rock :)
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I think that the best answer is going to be answer choice a)1
Spiders are called arachnids. So, a crazy fear of spiders is called arachnophobia.