Answer:
Bathymetry
Explanation:
to remember this, just think of the ocean as one big "bath"
In anthropology and geography, a culture region, culture sphere, culture area or culture area refers to a geographical area with one relatively homogeneous human activity or complex of activity (Culture). Answer A is the most likely answer.
The correct answer is - east side of Ecuador's mountains.
The Amazon River watershed is on the eastern slopes of the Andean mountain range where the country of Ecuador is located. This is where the huge amounts of rain create huge springs that give the basis for the Amazon River and all the other rivers that come into it from that region while going down to the enormous Amazon basin.
