Aerial metagenomics' best refers to which one of the following situations?

* Metagenomics (also referred to as environmental and community genomics) is the genomic analysis of microorganisms by direct extraction and cloning of DNA from an assemblage of microorganisms. It involves: 1. Isolating DNA from an environmental sample, 2. Cloning the DNA into a suitable vector, 3. Transforming the clones into a host bacterium, 4. And screening the resulting transformants. * Such an approach helps in sampling an entire habitat at one go. Researchers have shown that environmental DNA (e-DNA) can potentially identify and monitor terrestrial animals. Animals shed DNA through their breath, saliva, fur, or faeces into the environment. These samples are called e-DNA. Hence, Statement A is correct.