You must pack food that has high concentrations of fat and protein. Food like granola bars and canned meat are a good source of energy and heat. This is because the body breaks this food down easily converting it into usable energy. Though some people would suggest that you pack food that are high in carbohydrates, fats and proteins are long-term sources of energy that you would need for your hiking trip.
D is the most likely answer because as the glacier moves across the landscape, it leaves many deep ridges into the earth. They eventually collect water and form deltas.
Answer:
In science, a variable is any item, factor, or condition that can be controlled or changed
