Cliffs can collapse because of the weather naturally eroding it. Also when water is constantly crashing against them, it can erode the layers of the cliff. It can also happen in a mud slide when the rain makes the soil extremely wet causing the rock to fall. Also in a rock slide when a piece of rock breaks off from the entire cliff.
Answer:
He was the first to sail around Africa to India
Explanation:
The good neighbor policy was geared toward the Latin American countries.
In the civil war 750,000 Americans died.