Given the task definition and input, reply with output. Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: migration is an instinctive behavior

Geese fly south for the winter because?
Given the task definition and input, reply with output. Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: migration is an instinctive behavior

user
Geese fly south for the winter because?
assistant
Given the task definition and input, reply with output. Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Fact: migration is an instinctive behavior

Geese fly south for the winter because?