1. which of the following is an abiotic factor in an environment?
a) a snake
b) a snail
c) a rock
d) a tree

The answer is C.) Rock

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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Abiotic means it is not living.
A snake is living so that's incorrect
A snail is living so that's incorrect
and a tree is living so that's incorrect

the only non-living object here is a rock

So a rock is the abiotic factor