Which theory of motivation hypothesized that within every human being there exists a set of needs that resembles a pyramid?

The answer is "Maslow's hierarchy".
 Abraham Maslow presented the theory in 1943 though it was it was fully expressed in 1954 by him in his famous work “Motivation and personality”. It is this theory of motivation which hypothesized that within every human being there exist a set of needs that resembles apyramid. I am uploading a picture portraying the pyramid.

The answer would definitely false

Who it was like back then