Hi there!
This can be called a hill.
<span>They act like dams or form long ridges of land.</span>
<span>Delta and American Airlines, for example, only allows children 15 and older to travel alone domestically without their unaccompanied minor service</span>
Answer:
A type of democracy in which people elect their representatives directly.
Ancient Athenians used this type of democracy to elect their leaders when they gather at an assembly.