Which of the following is not an example of natural selection?
a. many strains of bacteria are now resistant to some commonly used antibiotics.
b. some insect species are now resistant to pesticides.
c. due to increased shark populations, seal populations have more streamlined bodies
d. like certain other crops, domesticated strawberries are larger than wild strawberries

The correct answer is C. Due to increased shark populations, seal populations have more streamlined bodies.

Explanation:

Natural selection can only be compared between organisms of the same species. The comparison between sharks and seals is not an example of natural selection because it doesn't explain properly why there's a relationship between the two species and how it led to a change in the seals' bodies.

not sure if this what   you'r looking for would be percent composition

the scientific method.