Polygenic traits are characters whose phenotypes are influenced by two or more genes. These traits are displayed in continuous distribution. These characters generally have two alleles of each gene but can have multiple alleles too.
Height is also a polygenic trait in humans. Humans can be of different sizes. It is controlled by three genes and six alleles. Eye color, skin color and other traits also polygenic traits in humans.
Thus, the correct answer would be two or more genes.
Albinism is the "congenital absence of any pigmentation or coloration in a person, animal or plant, resulting in white hair, feathers, scales and skin and pink eye."
for 2 water can erode rocks to make canyons and other rock formations 3 because some land mases were formed with water and 4 because in many countries there are monsoon seasons witch brings heavy rain and high humidity
