What is discontinuous variation?

discontinuous variation (qualitative variation) Clearly defined differences in a characteristic that can be observed in a population. Characteristics that are determined by different alleles at a single locus show discontinuous variation, e.g. garden peas are either wrinkled or smooth. Compare continuous variation.

Discontinous variation, a characteristic of any species with only a limited number of possible values. Human blood group is an example of discontinuous variation.

i think that c)gold was found there

but i am not sure

hope it mark me as brainlieast.