D.) <span>The statistical study of human population to learn its size, density, and characteristics is called "Demography"
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Answer: There are many reasons as to why, but here are some main ones. You can experience pressure which can cause you to stress out and can easily put you in a bad mood. You can end up having anxiety due to whatever which can make you feel worried. Or, you can end up having something in your mind that can make you feel sad and gloomy.
Answer:
In an idealized free-market economy, prices for goods and services are set freely by the forces of supply and demand and are allowed to reach their point of equilibrium without intervention by government policy.
Explanation: