ASAP I WILL MARK BRAINLIST. Why does competition happen?A. Different organisms have different needs.B. There are no predators in an ecosystem.C. There are limited resources in an ecosystem.D. Organisms do not need the same resources.

Whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.