All spheres of earth are interrelated or interdependent. this means a. they are separate spheres and function independently b .they are related in that they are of earth and function for earth c. they all depend on each other to function; an impact to one sphere usually affects another d. one cannot exist without the other

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?