Answer:
I will research on troposphere Because:-
1. Most of phenomena occurs in troposphere
2. Most of terrain is found in troposphere
3. It is first layer of atmosphere
4. It is the nearest layer of atmosphere from the surface of earth
5. As it contain most of things so there most chance of discovering a new undiscovered thing
Explanation:
Hope this help!!
The correct answer is C. Glacier
Explanation
In the image, you can see the water cycle, and there are four letters, A, in the part of the sea; B on the earth's surface; the C below the Earth's surface, and the D in the mountains. In the area where the D is, there are glaciers on the mountain peaks caused by the low temperatures in the area. In addition, a glacier is a mass of ice formed on the earth's surface by the accumulation of snow on mountain peaks, in Antarctica, the Arctic, and Greenland. Therefore, the correct answer is C. Glaciar.