How can invasive species affect biodiversity

Here are some ways invasive species impact native ecosystems:  

Habitat modification.

Compete with native species for resources.

Predation of native species.

Herbivory on native plants.

Bring in pathogens.

Hybridize with natives, leading to loss of genetic diversity.

Explanation:

complete the square on the right side of the equation;

-5(x + 0)^2 + 15

answer: d. y = -x^2 + 15

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.