Answer: the need of evolution
Explanation: Charles Darwin saw the differences between the birds beaks in the Galapagos island. The beaks were different because of the different food that the environment provides.
Multiple things cause the migration of people.
Economic issues arise:
People run out of jobs and opportunities
(BIGGEST REASON)
Cultural reasons:
Forced intentional migration had occurred in the past on accounts of slavery and political instability
Safety:
More popular reason now is because of war or fights with other countries, the people want to keep their family safe so they move them or move with them
Hope this helped
Answer:
They adapt and survive because of Natural Selection
Explanation:
The sea animals die off if they cannot survive under certain conditions so they adapted to having eyes that can see, and other necessary survival tools for the bottom of the deep sea.
B:Selection is your answer