A drainage basin is a very important concept to understand in geography. Drainage basins can be huge or even small depending on the location of it. A drainage basin is an area of land where precipitation which is any kind of water that falls from the clouds gathers and drains into a body of water.
I just did this lesson, and the answer is B.
I hope this helps you!
-Mikayla
If you search the coordinates it leads to a point in the ocean off the east coast of South America, the -3780m implies whatever is there is under the ocean, it would require high tech gear to reach that depth, since the box from mpk's video is said to be from the Mariana's web than that location could be were Atlantis was and or is resting but that's just me connecting the dots and I could very well be off by a Longshot
