Which of the following is an example of a cline?

a. in a species rabbits those that are farther south tend to be darker hybrid tomato plants are stronger and produce more fruit than those of pure genotypes males of a species have long horns that are used to fight each other many bird species have bright plumage that is used in courtship displays

In a species a rabbits those that are further south tend to be darker.

Explanation:

Cline is a measurable gradient change in a species characteristics caused by a geographical gradient.

When species occupy geographical areas that have slightly different environmental conditions, there will be a measurable change in their phenotype and genotype.

That is why rabbits that live further to the south will tend to darker than rabbits living in other geographical areas.