Final answer:
True, recreational or private pilots must undergo a biennial flight review every 24 months according to Federal Aviation Regulations; it consists of one hour each of flight and ground training.
Step-by-step explanation:
The statement that each recreational or private pilot is required to have a biennial flight review is true. According to Federal Aviation Regulations, private and recreational pilots must complete a flight review with a certified instructor every 24 months. This review includes a minimum of one hour of flight training and one hour of ground training. The aim of the flight review is to ensure that pilots maintain an acceptable level of proficiency and that they are up to date with current aviation laws and procedures.