Final answer:
The subject of this question is Social Studies. U.S. registered aircraft numbers beginning with an 'N' is a specific identifier used in the United States to register and classify aircraft.
Step-by-step explanation:
The subject of this question is Social Studies. U.S. registered aircraft numbers beginning with an 'N' is a specific identifier used in the United States to register and classify aircraft. The subject of this question is Social Studies. U.S. registered aircraft numbers beginning with an 'N' is a specific identifier used in the United States to register and classify aircraft.
For example, a private plane registered in the United States may have a registration number such as N12345.