• 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.