Final answer:
The correct example of a fixed ratio reinforcement schedule is the scenario where you receive five dollars from your parents every time you learn three new songs on the violin.
Step-by-step explanation:
An example of a fixed ratio reinforcement schedule is option b) getting five bucks from your parents every time you learn 3 new songs on the violin. In this scenario, a specific number of behaviors (learning three new songs) is required before the reinforcement (receiving five dollars) occurs. Unlike fixed interval schedules where reinforcement is given after a set amount of time, fixed ratio schedules provide reinforcement after a set number of responses. The other options do not illustrate a fixed ratio schedule: a) is an example of continuous reinforcement, c) reflects a variable ratio schedule common in gambling, and d) represents a fixed interval schedule.