Why is mutual help necessary between the countries?​

In the same way, one country also needs help from other countries in order to fulfill their needs. Mutual relation and cooperation are very important for every country because if any dispute and problems arise it can be solved easily by making different agreements.

continues can help each other by lending materials and resource. They can also aid each other in war and in time on need

Explanation:

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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.