The answer you are looking for is organic!
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I would say Australopithecus because so far, its skull is the one that resembles the most that of a human's.
The appropriate response is classical conditioning. It is a learning procedure that happens when two boosts are over and over combined; a reaction that is at first inspired by the second jolt is at the end evoked by the primary jolt alone. Classical conditioning is the essential learning procedure, and its neural substrates are presently starting to be caught on.
It is A , d , and c . I can bet my last bagel bite