A person has boater education certification. According to Texas law, how old must this person be to operate a boat powered by a motor of 15 horsepower or more unsupervised?

In Texas, the law stipulates that a person must be at least 13 years of age to operate a boat powered by a motor of 15 horsepower or more without supervision, provided they have completed a boater education certification course. This requirement is in place to ensure that individuals who operate more powerful and potentially more dangerous vessels have received proper training and education on boating safety, rules, and responsibilities.

Understanding this age and education requirement is essential for promoting safe boating practices on Texas waters. It reflects the state's commitment to ensuring that young boaters are equipped with the knowledge necessary to operate vessels safely, minimizing the risk of accidents and injuries.

The other age options do not align with the legal requirements set forth by Texas law for unsupervised operation of larger boats. Thus, the correct answer emphasizes the importance of age and having the proper certification before individuals can safely operate more powerful boats.