Because most human characteristics are complex, many genes act together to determine a trait. this is called:

The correct answer is - Polygenic inheritance.

Explanation:

Polymeric inheritance takes place if a trait is influenced by two or more genes at a time. The genes can be normally high in numbers but show minute influences in the particular trait.

In humans, there are many complex gene interactions that control different characters of traits such as hair color, eye color, the height of individuals, and weight or skin color. There are many more traits that show polygenic inheritance.

Thus, the correct answer is - polygenic inheritance.

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.