Final answer:
First-cousin marriages are legally prohibited in some states in the United States, but laws vary across states. It's important to check the specific laws in each state.
Step-by-step explanation:
In the United States, first-cousin marriages are legally prohibited in some states. The laws regarding cousin marriages vary across states, so it's important to check the specific laws in each state. For example, in some states like New York and California, first-cousin marriages are allowed, while in other states like Texas and Kentucky, they are prohibited. It's essential to understand the laws in the specific location you are referring to.