What is the correct developmental sequence

According to this food web which of the following would be considered primary consumers

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

Which statement best compares aerobic and anaerobic respiration