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The President serves as the head of state and head of government in the United…

Infection happens when germs (like bacteria, viruses, fungi and parasites) invade and grow inside your…

Currency embodies the intangible system of value that facilitates trade in goods and services. The…

The immune system protects the body from harmful substances, germs and cell changes that could…

Wildfire is a natural process that plays an important role in forest ecosystems, but many…

Crime is behavior that violates public order and is subject to punishment by the state.…

Theft is a broad term that encompasses a number of crimes such as larceny, burglary,…

In parliamentary systems with monarchies or parliamentarian republics, the Prime Minister is often considered the…

Conservation is the study of Earth’s biological diversity and how to prevent its loss. It…

Ice melting is a global phenomenon that has many important impacts. It increases sea level,…