Match the term with its definition.
3. Rock cycle
a. Any rock between 2 mm and 4 m in diameter.
b. A model describing the formation, breakdown, and reformation of rock as a result of natural processes.
c. A naturally-formed, nonliving, aggregate solid.
d. A geological feature made of one single massive rock or piece of rock.
e. Melted rock.
f. A homogeneous, naturally occurring, inorganic solid with a definite chemical composition and characteristic crystalline structure.