Context: A population is a group of individuals of the same species that live in the same place. The individuals in a population often have differences in their traits. These differences are called variations.
Figure: mice from the population.
Complete the following statement.
In this population, black fur and brown fur are () of the fur color ().
A. traits . . . variation
B. variations . . . trait
Identify the correct choice from the options below and respond with the letter of the correct option.

B