Consider these three time periods: The period of the earliest Americans
The period when major cultures first developed in North America
The period before Europeans arrived in the late 1400s
Select one of these periods and write a short paragraph explaining how the peoples in the Americas were affected by their environment at that time.

add the answer choices and i'll give you the answer

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.