In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

Input: Consider Input: Sound enters the ears of a person. The sound hits a drum that is inside the ear. The drum inside the ear converts the sound to electrical impulses. The electrical impulses are sent to the brain. The brain can decode the impulses into sound. 

Output: How does the human auditory system work?


Input: Consider Input: A butterfly starts as an egg. The egg hatches. A larva emerges. The larva eats and grows. The larva sheds its skin. The larva enters a chrysalis. The pupa grows inside the chrysalis. The adult butterfly exits the chrysalis. The adult butterfly is now fully grown. The adult butterfly lays more eggs. 

Output: Describe the lifecycle of a butterfly


Input: Consider Input: You start with a glacier. Through warming or other methods a chunk is taken off the glacier. The chunk drifts into the sea. And it settles where it can remain in its state. It is considered an iceberg. 


Output: How do icebergs form?