Robert watches for shooting stars on a clear night, and sees one approximately every two minutes. This is an example of a schedule of reinforcement.

Fixed-interval

Explanation:

Fixed-interval schedule: In psychology, the term "fixed-interval schedule" is described as one of the different reinforcement schedules and is a part of the operant conditioning. In fixed-interval schedule, reinforcement is being provided to a specific and desired response after a "predictable amount" of time has elapsed.

In the question above, the given statement represents "fixed-interval schedule" of reinforcement.

answer; i believe that the correct answer is culture based resources;