Answer:
The correct answer is - option A) It refers to the collective genes of a specific bacterial sample
Explanation:
Microbiome. the absolute number of genes from life forms microbes in a specific environment. For our situation, these environments/habitats are found in various territories of the body (skin, gut, stomach, and more).
The microbiome can be any specific community or a group of genes of a specific microbe or bacterial sample, not a specific disease or fat-digesting group of bacteria.
Thus, the correct answer is option A)