After visiting a factory on a field trip, your little sister is really concerned about her carbon footprint. Name two ways that she can reduce her carbon footprint at home, and explain how it will help the environment.

It has been around since 1858 so b. false

Although i don't know what is the simulated system, starfish are predators that eat mostly  microalgae,  snails, sponges, bivalves, mussels and other small marine animals. removing starfish from any system would definitely increase this animals that they prey.