What happens if the death rate is higher than the birth rate?

How can changes in technology or consumer demand make it difficult for people to get jobs? by changing the number or kind of jobs available by making it possible for some people to work fewer hours by making it difficult for people to buy what they want by creating a demand for things that are not available

To what kinds of messages might the brain respond to keep you balanced on one foot?

Restricting immigrants from entering a country may be based on what belief?