What organisms serve as the keystone species in this ecosystem? why?

Mussels & Sea Stars

Explanation:

A cornerstone animal types is a creature that characterizes a whole environment. By keeping populaces of mussels and barnacles under control, this ocean star guarantees sound populaces of kelp and the networks that feed on them—ocean imps, ocean snails, limpets, and bivalves.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint