The best and most correct answer among the choices provided by the question is the first choice "demographers"
Demography<span> is the science of populations.</span>Demographers<span> seek to understand population dynamics by investigating three main demographic processes: birth, migration, and aging (including death).</span>
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Answer:

Explanation:
Given


Required
Find AC
I will answer the question with the attached triangle
From the attachment:

Make AC the subject

This gives:



The answer is: waterfalls can usually be found wherever there is lots of erosion or where there is steepness in the river's channel.
Answer:
Explanation:
Of the people’s action. People don’t take the initiative to think about what they are doing and how badly it’s affecting the environment.
Answer:
1. it has to do with social communication
2.Tgey needed a water source for their crops, people, and other things that needed water