Answer:
(D) Environment and Heredity
Explanation:
Hereditary is the transmission of physical and genetic qualities and attributes of parents to their offspring; the biological law by which living beings tend to repeat their characteristics in their descendants. So Susie understood very well that her height is as a result of the gene pass on to her by her parents and that good environment and eating healthy as a kid also contributes to one's physic.
Africa? I don't see the answer choices so I'm not sure.
