Skin color is encoded by several different genes which results in a range of skin colors from very dark to very light. this is an example of

The above is an example of polygenic inheritance. Polygenic Inheritance is the assurance of one complex character by nonallelic qualities called polygenes, which have a combined impact. Under various ecological conditions, polygenic legacy prompts a constant, or quantitative, variety of the character in an organic populace.

C- a hypothesis or d- an observation

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.