One aspect of both nature and nurture that profoundly affects each person is the _____,which refers to all bacteria that live within every part of the body.

A) genome
B) allele
C) microbiome
D) zygote

The microbiome refers to all bacteria that live within every part of the body, and it is influenced by both nature (genetic factors) and nurture (environmental factors). The microbiome can have a significant impact on overall health, including immune function, digestion, and even brain function. Therefore, it is an aspect of both nature and nurture that profoundly affects each person. The other choices (A, B, and D) do not specifically refer to the bacteria in the body and are not as closely related to the microbiome.