Organic material in soil contains a substance called "humus". Humus is defined as A. dark organic matter that forms from sand
B. dark organic matter that forms from granite
C. dark organic matter that forms when plants and animals decay

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 !

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!