**Must**

To drive a car in California, you must have a driver's license. This requirement is in place to ensure that drivers have the necessary knowledge and skills to operate a vehicle safely on the road. Obtaining a driver's license involves passing both a written exam and a practical driving test, which assesses an individual's understanding of traffic laws, road signs, and their ability to apply these rules in real-world driving situations.

**Legal Requirement**

Having a valid driver's license is a legal requirement in California. It is necessary to comply with the state's traffic laws and regulations. Driving without a license can result in penalties, such as fines, license suspension, and even imprisonment in certain cases. Therefore, it is crucial for all individuals who wish to drive a car in California to obtain a driver's license before operating a vehicle on public roads.

**Safety and Accountability**

Requiring a driver's license helps ensure the safety of both the driver and other road users. It serves as evidence that the driver has undergone proper training, understands traffic laws, and has demonstrated the necessary skills to operate a vehicle safely. This accountability promotes responsible driving behavior and reduces the risk of accidents caused by inexperienced or unqualified drivers.

**Identification and Verification**

A driver's license is also an essential form of identification and verification. It provides important information about the driver, including their name, address, date of birth, and a photograph. This identification aspect is particularly important for law enforcement officers who may need to verify the identity of a driver during routine traffic stops or in the event of an accident.

**Insurance and Liability**

Many insurance companies require individuals to have a valid driver's license in order to obtain auto insurance coverage. By enforcing this requirement, it ensures that drivers are legally allowed to operate a vehicle and have the necessary documentation to protect themselves and others in the event of an accident.

In conclusion, having a driver's license is a legal and safety requirement in California. It ensures that drivers have the necessary knowledge, skills, and identification to operate a vehicle responsibly and safely on the road.