How has the coqui tree frog affected the population of native species

The introduction of Coqui frog took place accidentally from Puerto Rico into Hawaii in the year 1988. The introduction of the frog species has posed a danger to the island ecosystem of Hawaii and is also a source of major noise nuisance. The species of the frog has an enormous urge to eating, which is putting the native species of spiders and insects of the island at a greater risk.  

The Coqui frog species can even thrive in distinct ecological zones and heights in the region and are also witnessed at the height of 4000 feet above the level of the sea. These frogs can also compete with the local fauna and the endemic birds, which are solely dependent on insects as the source of their food.  

its the cell wall and the they are unique to plant

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.