Study the photo of this collection of hunter-gatherer tools. What do they suggest about the society that created them? Choose three answers. They needed pointed tools for cutting. They used many materials to create tools. They used rocks without altering the rocks' shape. They used one material and shape for tools. They shaped tools for different purposes.

The correct answers are A) They needed pointed tools for cutting. B) They used many materials to create tools. E) They shaped tools for different purposes.

What these tools suggest about the society that created them is that they needed pointed tools for cutting, they used many materials to create tools, and they shaped tools for different purposes.

Although you forgot to include the photograph, we can do some research and find that the photo shows many different rocks with different shapes that helped hunter-gatherer to hunt big animals such as the Buffalo to feed their families and to cut trees to collect fruits.

Hunter-gatherers were nomad people who followed the herds to hunt them. Until humans learned to developed agriculture techniques, they could settle in one place to grow crops.

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.