Humus consists

a. anions and cations found in the soil
b. mostly water and inorganic nutrients
c. decomposing organic material
d. all of the organisms inhabiting the soil
e. strictly soil microbes

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !