Question

variations within a species are an important part of charles darwins theory of evolution. which example can be explained by individual variation?
the food source in a lake is not enough to support the bass population, but it can support the trout
a population of brown bears has doubled in the past 10 years as its habitat size has increased.
owls and foxes compete fiercely against each other for small rodents in their habitat.
brightly colored cardinals are better able to survive and to reproduce than darker cardinals.

Explanation:

Individual variation in Darwin's theory refers to differences among individuals of the same species that can affect survival and reproduction. Brightly - colored cardinals having an advantage in survival and reproduction over darker ones shows individual variation within the cardinal species. The other options are about population - level changes or inter - species competition rather than individual variation within a species.

Answer:

Brightly colored cardinals are better able to survive and to reproduce than darker cardinals.