It could be reflex or instinct, most likely reflex
A situation where friction would be desirable is rubbing your hands together to make them warm in the winter time.
Biotic Factors are any living components that affect other organisms, and since soil is not alive (soil is an abiotic factor) then you can eliminate A., B., and C. D is the answer choice that has only biotic examples.
The answer to this is all of the above.
