Which factor contributes to natural selection for each condition? (2 points)

it would lead to upper respiratory infections and pneumonia.

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

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation: