Give two examples of polygenetic traits

This means that each dominant allele "adds" to the expression of the next dominant allele. Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!