Bacteria to amphibians. amphibians started to turn to fish and some started walking to land. They started laying eggs and turning into reptiles. those reptiles started growing hair turning them into four legged mammals. the mammals then turned to primates which evolved into us.
The answer is true, if something in coming at you from a steep direction, there will me more of a long oval shape rather than it hitting you head on making a circle
Delta can also be an easy answer plus it is easy to remember
