Pericles instituted the world's first democracy in Athens.
This shows a cinder cone volcano. It forms when cinders erupt again and again, piling up around the vent to form a steep, cone-shaped hill.
Answer:
The Mexico–United States barrier (Spanish: barrera México–Estados Unidos), also known as the border wall, is a series of vertical barriers along the Mexico–United States border intended to reduce illegal immigration to the United States from Mexico.
Explanation:
A river's width and depth increases as more water is added from tributaries.
