Teacher:Given a scientific passage and an answer, generate a question for the given answer.
Teacher: Now, understand the problem? Solve this instance: Passage: The pupil is an opening in the front of the eye. It looks black because it doesn't reflect any light. It allows light to enter the eye. The pupil automatically gets bigger or smaller to let more or less light in as needed. Answer: the pupil
Student:
What is the opening in the front of the eye?