The matching surfaces allow for movement in multiple directions.
please add answer choices. I hope this is what you were looking for
Answer:
The three reasons are Economic development, rising population and undernourishment
Explanation;
as country's grow wealthier people can afford to eat more food, world population continues to grow and likely to exceed 8 billion people by 2030, and people have been consuming too few calories which can cause people to become underweight Hopefully this helps!