Final answer:
Adults over the age of 18 or 21, based on the state, receive a horizontal driver's license, which visually distinguishes them from minors who have vertical licenses.
Step-by-step explanation:
The age group that will receive a horizontal driver license typically comprises adults over the legal adult age, which is usually 18 or 21 years old depending on the state in the United States. This contrasts with a vertical driver's license, which is generally issued to underage individuals, such as teenagers, who are not yet considered legal adults. The design is used to visually distinguish between minors and adults quickly, especially in situations where age restrictions apply, such as purchasing alcohol or tobacco.