Can someone me with question 2 plz

Energy derived from hot rocks and fluids beneath the earth’s surface is

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim