Fungi of the phylum Basidiomycota form mycorrhizal associations with orchids, a type of flowering plant. How do these associations benefit both the fungi and the orchids? A.
The orchids release enzymes to break down sugar for the fungi, while the fungi fertilizes the soil surrounding the plant.
B.
The orchids produce decaying material for the fungi, while the fungi provide structural support to the orchids.
C.
The orchids gain nutrients and carbon dioxide from the fungi, while the fungi gain oxygen and sugar from the orchids.
D.
The orchids receive water and oxygen from the fungi, while the fungi receive food and minerals from the orchids.

i thinking chemical change

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.

i'd have to say the answer is probable the second option "the geosphere interacting with the atmosphere"