Task: Question Answering
Input (English): Sea stars are consumers that live in a tide pool ecosystem that is alternately submerged and exposed by tides. This type of ecosystem contains poisonous anemones and many species of shellfish. The sea star's advantage in this ecosystem is that it can  
 (A) pry open shells. (B) produce a tiny light. (C) move quickly along the sea bottom. (D) survive the pressurized atmosphere of deep water.
Output (English): A