Bees with a larger wingspan were able to produce more offspring, making the trait more common. It could be said that ____ favored the bee with the larger wingspan, and so the ____ evolved.
Natural selection is a mechanism of evolution by which individuals of a population having a specific phenotype that is favored in a given environment can reproduce more and survive better and hence, the population of individuals with that specific phenotype increases with time.
In the given situation it is given that the bees with a larger wingspan produced more offspring and hence, this shows that natural selection favored the bee with a phenotype of larger wingspan and thus, the population evolved with time.