How do you balance a skeleton equation?

According to the loco mass the mass of reactants and products

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a