What is the border between layers a through f and layer g called?

i think the answer is : The next layer up is called the stratosphere. The stratosphere extends from the top of the troposphere to about 50 km (31 miles) above the ground . The jet stream flows near theborder between the troposphere and the stratosphere.

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.

Answerbeaches;