A bird population only eats a certain type of plant. One year, flooding washes away most of these plants in an area What will most likely result? immigration followed by competition
competition followed by immigration
emigration followed by competition
competition followed by emigration​

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.