The analysis of total microbial genomes in an environment is called and the total microbial genomes in an environment (or the total microbial community itself) is called a . (When typing your two answers, separate them with a comma and space.)

The analysis of total microbial genomes in an environment is called metagenomics and the total microbial genomes in an environment (or the total microbial community itself) is called a microbiome.

The study that is associated with the genetic materials that are obtained directly form the sample in an environment refers to the term Meta genomics or  ecogenomics or community genomics. It can be considered as the process through which the  meta genome is produced.

The genetic material of the microbes such as  fungi, bacteria, viruses and protozoa refers to microbiome. These microbes lives inside the body of humans. The weight may range upto 5 pounds for these microbiomes. Micorbiomes are the total number of micro genomes that are present in the environment.

the answer isB