It tells you that there used to be an ocean in the area the rock was found.
A fortuneteller? Other names are soothsayer, seer, clairvoyant, and oracle.
Single family units are more common in the suburbs and multiple housing units like apartment and condominium units are more common in the city core or at least this is the way housing is in the city of Vancouver in British Columbia, Canada.
I believe the answer would be A. Diffusion is "the spreading of something more widely" Which fits in with this.
Answer:
From UV rays from the sun
Explanation:
Because UV rays are dangerous
