What might cause birds in population a to immigrate to the island? how will the level of competition among birds in population b change if many birds from population a join population b?

The birds might populate from island A to island B because their may be less competition there with other birds, I’m not definite on this answer but I hope it helps

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 !