What does diaspora mean in social studies

A diaspora is a large group of people with a similar heritage or homeland who have since moved out to places all over the world

So basically,  diaspora is a group of people who have migrated into another country by some force or situation but maintain close ties with their homeland.

two jet streams that directly affect the formation of weather in the continental part are a polar jet and a subtropical jet. they are responsible for the transportation of weather systems, which directly affect people. the polar front is the boundary between cold air from the north pole and warmer equatorial air. both the polar jet and the subtropical jet blow from the west to the east, and follow the boundary between cold and warm air.

the strongest jet streams are polar jets, while subtropical jets are somewhat weaker.

the right answer is c. the polar jet stream is generaly stronger than the subtropical jet stream.

the answer your looking for is c. : )