Which of the following is an example of a static stretch?

A seated hamstring stretch is indeed an example of a static stretch because it involves holding a position for a prolonged period of time to lengthen and relax the muscle without causing movement. During this stretch, you sit and extend one leg while reaching towards your toes, allowing the hamstring muscle to fully elongate in a controlled manner.

Static stretching is typically performed after a workout to help improve flexibility and reduce muscle tension. It contrasts with dynamic movements that involve motion, which are found in the other choices. High-knee jogs, burpees, and jumping jacks are examples of dynamic exercises that incorporate movement and aim to increase heart rate and engage multiple muscle groups rather than focusing on muscle lengthening through sustained holds.