Because they are formed naturally. Therefore they are not manmade.
They are formed as borders because they are formed naturally.
To shutcho biscuit
Rio Grande (Mexico), Red River (Arkansas, Oklahoma), Sabine River (Louisiana)
Rivers, Oceans, Seas, and Mountains.
Physical features such as rivers, mountain ranges, deserts, and oceans can serve as natural borders between countries. These features act as barriers that delineate the boundaries and can make it difficult for people to cross from one country to another.
Spain's borders do no follow rivers.
They are formed as borders because they are formed naturally.
Some natural features that serve as borders include rivers (e.g. the Mississippi River separating several US states), mountain ranges (e.g. the Himalayas between India and China), and oceans (e.g. the Atlantic Ocean between North America and Europe). These features have historically influenced the formation of borders due to their physical barriers and distinguishable boundaries.
Yes, states have borders that separate one from another. These borders are typically defined by geographical features such as rivers, mountains, or man-made boundaries like fences or walls. They serve as a demarcation line to distinguish the territorial jurisdiction of one state from another.
The line between countries is called a "border." Borders can be defined by natural features, such as rivers and mountains, or by artificial means, such as treaties and agreements. They serve as boundaries for political, legal, and economic purposes, often influencing trade, immigration, and governance.
The rivers
Tigris and Euphrates Rivers.