Which statement best describes a keystone species? A. Its birthrate is the highest of all the species in the community. B. It has the highest amount of genetic diversity in the community. C. Its extinction would cause a significant change in the community. D. It serves as a predator of many other species in the community.

The magnets would be | n s | and | s n|

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.