A. craters, because it's what keeps water in certain places
A<span> fuel (sugar from food) <span>and oxygen with which to burn the fuel. One then also needs a mean of removing the waste products produced by burning the fuel.</span>
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If the Earth's axis tilted 45 degrees instead of the current 23.5 degrees, the seasons would be far more pronounced than they are, and the poles would be warmer overall. ... An axial tilt of 45 degrees would bring more heat to bear on the hemisphere facing the sun.
You should probaly put the images up, so people can help you (:
