What is a kind of technology used by Stone Age humans?

You may think of technology as a phone, computer, or TV but before that all was invented, technology was simply man made items that had some type of purpose. Some stone age technology is: Canals- these helped them water and grow crops. They also used hand axes and spear points for hunting large game. Scrapers: They used these to prepare animal hides and awls for shredding plant fibers and making clothing. Not all of their tools were made of stone. Towards the end of this time, they started using metal for tools and weapons and this became the transition to the Bronze Age.

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answer; i believe it was by president pranab mukherjee or by the chief justice of kerala high court; ///plz check luck

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.