How did Harry Hess, Arthur Holmes and Alfred Wegener contribute to our understanding of Earth systems and the changes that have shaped and reshaped Earth’s surface?

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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a is the best answer your welcome

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.