Phylum. The classification system goes: Kingdom, Phylum, Class, Order, Family, Genus, Species. Anything that shares a class also share anything above it.
The answer is A: phytoplankton provides nutrients to consumers in the ecosystem.
Hope this helps:)
If haploid didn't occur on gametes, it would occur on diploid, which would increase the number of chromosomes, and the child would have a lot of them.
So, what would happen if gametes were not haploid is that B. the offspring would have double the number of chromosomes it is supposed to have.