Answer:
Brittle stars eat decaying plant matter (they are detrivores) and plankton, but can also kill small animals to eat as well.
Explanation:
They do this by pushing their stomach out through their mouth, like most starfish. Hope this helps.
Answer:
The Acacia tree's and other small plants the elephants eat would begin to grow in terms of population. Similar to if the elaphants grew in population, the Acacia tree's would decrease in population.