What type of a trait results in the large variation in shoe size among humans?

Is a quantitative trait.

A quantitative trait is a phenotype that can be measured and depends on the cumulative actions of many genes and the environment.
These traits are very variable among individuals, there is a range of phenotypes with continuous distribution. For examples: height, weight and shoe size.

Your answer will be b action plan.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.