The answer is all of the above because they are all true.
So the answer is D
The tropical rainforests have the warmest temperatures
I think your answer is B.) The objects must be in direct contact with one another
The Congo and Niger rivers have interesting irregular courses, and instead of going just in a certain direction, they circle around big areas. This is due to the shape of the landscape, and also because of the types of rocks in the surrounding areas where these two rivers flow.
The shape of the landscape is crucial in the course of a river, since every river is moving through the lowest parts where there isn't obstacles, so these rivers have followed that pattern and it turned out to give them irregular course. Also, the types of rocks on their way are very important, so these rivers managed to get through the sediment rocks as they are easy to erode, but haven't been able to break through the igneous rocks that are much harder.
Answer:
Spain
Explanation:
Here's an article going in-depth: https://history.house.gov/Exhibitions-and-Publications/APA/Historical-Essays/Exclusion-and-Empire/The-Philippines/
To be honest I'm not that good at explaining things when it comes to history :)
