Can cause tsunamis are caused by seismic waves carve valleys out of flat areas are the leading cause of flooding

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 !

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."