In costa rica one can find the arenal volcano surrounded by the cloud forest, a rainforest, and multitudes of life forms. this area demonstrates the interaction of which of the following "spheres"? check all that apply.
a. biosphere
b. exosphere
c. geosphere
d. cryosphere
e. atmosphere
f. hydrosphere

Option A- Biosphere

and Option C- Geosphere

Explanation:

The geosphere comprises of all rocky  and geological structure/components  of earth such as mountain, rock forms/deposits, volcanoes etc. while the biosphere consists of all kind of life forms on earth such as plant, animal, human being etc.

Here,  Arenal Volcano is a part of earth's geosphere while Cloud Forest, a rainforest, and multitudes of life forms are part of biosphere. Thus, the interaction is between the geosphere and biosphere.

Hence, option A and option C are correct.