A shadow is a surface light cannot touch or reflect off of. Usually shadows appear when the main object is covering a light source. For example, lunar eclipses. Lunar eclipses cause a shadow over Earth because they block the main light source, The Sun from our point of view, casting a giant shadow over Earth.
Answer:
They are rovers that are made to study Mars. For example, they can analyze the martian soil.
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Explanation:
A population will most likely deplete the resources of its environment if the population "increases".
It keeps the water in the plant, so it keeps the water from evaporating and killing the plant
