Concept:Natural selection works on the natural variations that already exist among individuals of a species.
Explanation:Individuals in every species differ from one another due to natural variations.
These variations may include differences in size, strength, colour, or ability to find food.
Some variations give certain individuals an advantage in their environment.
Such individuals are more likely to survive, reproduce, and pass on the useful trait.
So the statement that organisms with selective advantages are less likely to survive is incorrect.
Species do not consist of genetically identical individuals, and many organisms die before sexual maturity.
Thus, the presence of variations within every species is the basic condition that allows natural selection to occur.
Answer:A. There are variations within every species