A more thorough explanation:

Dual citizenship is when a person is considered a citizen of two different countries at the same time. This can happen in a few different ways:

• If someone is born in one country, but their parents are citizens of another country, they may be considered a citizen of both countries.
• If someone becomes a citizen of a new country, but their original country still recognizes them as a citizen, they may have dual citizenship.

For example, let's say that Maria was born in Mexico, but her parents are both citizens of the United States. Because of this, Maria is considered a citizen of both Mexico and the United States.

Another example is if someone from Canada moves to the United States and becomes a citizen, but Canada still recognizes them as a citizen as well. In this case, the person would have dual citizenship in both Canada and the United States.

Dual citizenship can have some benefits, such as being able to travel more easily between the two countries and having access to certain rights and privileges in both places. However, it can also have some complications, such as having to pay taxes in both countries and potentially facing conflicts of loyalty.