Which of the following is a requirement for driving in Texas?

Having a valid driver's license is a fundamental requirement for driving in Texas. A driver's license serves as proof that an individual has passed the necessary tests on road signs, traffic laws, and safe driving practices, thereby demonstrating their capability to operate a vehicle legally and safely.

This regulatory measure ensures that all drivers on Texas roads meet a baseline of competency which promotes safety for all road users. Without a valid license, individuals lack the legal authorization to drive, regardless of their driving skills or knowledge.

The other options, while relevant to aspects of vehicle ownership and driving education, do not constitute mandatory requirements for legally operating a vehicle. For example, it is possible to drive a car without personally owning it, and while a medical examination may be required in certain circumstances, it is not a universal prerequisite for all drivers. Similarly, attending a driving school can enhance a person's driving skills but is not a legal requirement to obtain a driver's license.