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Answer:
Your answer would be D). Why people like other people
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The thing that a geographer can't explain to a Historian is why people like other people. This is a thing they can't do because it's not their job to study the interactions and relationships between people, that's another person's job. The thing they study specifically is the environment, how it changed overtime , and how the environment changed people.
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Definitions:
Geographer:
A person that studies the earth, specifically its environment. They also study the changes the human society has on the earth.
Historian:
A person that studies about the past. They study human life, events, and etc that occurred in the past.
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Step-by-step explanation:
The reason why D). Why people like other people is the correct answer is because a geographer can't determine why people like other people. A geographers job is to study the earth, not about people's feelings about other people, that job is meant for someone else. Geographers don't study human interactions. Studying the earth has nothing to do with human interactions and relationships. The person that actually studies the interactions between humans and other humans are sociologists. It's a sociologists job to study the interactions and relationships between people. Therefore, this is the reason why that would be the correct answer.
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Why the other answer choices are incorrect:
Answer choice A). why people populated different areas is INCORRECT because:
This is one of the things that geographers can explain since they study the earth. Since they study the earth and understand the differences in land and biomes in other places, they know the reasons why people would populate one place over an other. For example, geographers would know that people would highly populate places like North America over Antarctica, since North America has more land and better climates than Antarctica, which is super cold and would need a lot of equipment to survive there.
Answer choice B). how people changed their environment is INCORRECT because:
This is another thing a geographer can explain since they study the earth. What a geographer also do is see how the human life has change the earth over time. For example, geographers can see how much the earth changed when humans started to cut down trees to make paper, and it is a really big difference. Another thing they notice is how humans have shaped land, specifically putting asphalt (roads on the ground). They know what the earth looked like before there were streets or roads on the ground.
Answer choice C). how the environment changes people is INCORRECT because:
This again is another thing a geographer can do and explain. Since they study the different environments around the earth, they can tell why people act and look different in different parts of the earth. For example, they know people in Africa tend to have darker skin than people in Europe, due to the amount of sunlight and heat rays Africa gets, while people in Europe tend to have lighter skin. This all bases where the person is and what environment they're part of.
All of these answer choices have something that is based on the environment or earth, and that is what a geographer does, study the environment and how it changes people. The question is asking you what the geographer can't explain, but all of these answer choices are incorrect because these are the things that geographers can explain, since they study these types of things.
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-Julie