Why do homologous organs suggest relationships among organisms

homologous structures adapted to different purposes as the result of descent with modification from a common ancestor

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 !

a physical change is being made.