Answer:
vary, affect reproductive success, and be heritable
Step-by-step explanation:
This can be explained by evolution which means change in traits of pollution from one generation to the another. the necessary condition to evolve a trait is vary, affect reproductive success and heritable.
vary signifies change in trait from one generation to another
affect reproductive success: means the change must affect positively the reproductive success or breeding of offspring.
heritable means it should be transferred via genes.