Igneous, sedimentary and metamorphic
Answer:
The geographer in the passage is focused on human geography.
Explanation:
Human geography is part of geography that focuses on humans, their activities in the environment (both natural and anthropogenic), their characteristics, movements, as well as the reasons for any of them. Not to be mistaken though, despite humans being in the center of this part of geography, everything is connected with physical geography in one way or another, thus there are a lot of connections between the two major branches of geography.
In this case, the geographer is gathering data about the migration of people from one country to another in a given time period, as well as looking for patterns in that time period to find out why is that the case. Basically, the geographer is researching human activity, from one human-based creation to another, but all of that happening in the physical sphere, thus it is of interest to human geography, but as mentioned it is easy to see that there is a connection with the other part of geography as well.
The answer is deep sea trenches
Illustrate has a couple of meanings. First, illustrate means to explain something with pictures, charts, etc. Second, illustrate means to state as an example of something.
