Which of the following describes a way this model can best be used? A. It can be used to study the entire water system on a manageable scale. B. It can be used to study the effects of climate change on water resources. C. It can be used to determine which areas will receive rain in a particular time frame. D. It can be used to determine the current amount of freshwater available for consumption.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

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tobey

the form of energy changes and the total energy increases0l

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explanation: bc blah