Answer:
It is difficult to cross.
Explanation:
The Sahara desert is a vast region about the size of the continental United States that is extremely dry and barren. The lack of water resources in the desert make the land unsuitable for agriculture and human population.
As a result, the Sahara acts as a giant natural wall both economically, culturally, and socially since relations between states to the north and south of the desert are difficult.
Answer:
The origin of the aurora begins on the surface of the sun when solar activity ejects a cloud of gas.
Twilight zone because the twilight zone is the deepest part of the ocean
Answer: D. They are affordable for everyone to install.
Explanation: I hope this helps :)
