Final answer:
Metagenomics is the correct answer for the sequencing of DNA from the fluid at the bottom of a garbage can because it studies the genomic fragments from microbial communities, analyzing the collective genetic material of multiple species.
Step-by-step explanation:
Sequencing all the DNA in the fluid that leaks from the bottom of a garbage can is an example of metagenomics . This field of science involves studying genomic fragments from microbial communities, , which allows researchers to study genes from a collection of multiple species. It often includes the use of techniques such as shotgun sequencing to reconstruct whole genomes and can involve various applications such as bioinformatics, pharmaceuticals, and pollution control. Metagenomics contrasts with DNA profiling, which is used to identify individuals, or gene expression profiling, which analyzes the expression patterns of genes within a single organism or cell type.