I believe the best answer is C. i mean it has already made that progress, hints the term developed, not developing. i hope this helped, have an amazing day :)
Often, waterfalls form as streams flow from soft rock to hard rock. This happens both laterally (as a stream flows across the earth) and vertically (as the stream drops in a waterfall). In both cases, the soft rock erodes, leaving a hard ledge over which the stream falls
Answer:
a)Mount Everest with highest altitude above the mean sea level at 29,029 feet
Incoming solar radiation is almost double at the equator then at the poles, causing the water closer to the equator to be warmer. The heat difference also causes the oceans to swirl so the water that is around the equator will eventually end up at the poles and keep circulating around.
