3persons are entering a five storied building they can go to the first, second ,third and fifth floors what is the probability that they will meet in one floor

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 correct answer is:

a population changes in response to a change in the environment.

idk lol use google m8