Instructions: In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Input: Sea urchins feed mainly on algae , so they are primarily herbivores , but can feed on sea cucumbers and a wide range of invertebrates , such as mussels , polychaetes , sponges , brittle stars , and crinoids , making them omnivores , consumers at a range of trophic levels .
Output:
Sea urchins feed mainly on algae , but can also feed on sea cucumbers , and a wide range of invertebrates such as mussels , polychaetes , sponges , brittle stars and crinoids .