Many days of rain causes a river to overflow its banks. the flood moves peoples belongings, carries mud, and uproots trees. all these things are dropped in other places when the water recedes. this disaster describes?

Which statement about variation is true? a) all phenotypic variation is the result of genotypic variation.b) all genetic variation produces phenotypic variation.c) all nucleotide variability results in neutral variation.d) all new alleles are the result of nucleotide variability.e) all geographic variation results from the existence of clines.