During a typical morning, colin checks the clock frequently before being reinforced with confirmation that the time for his regularly scheduled lunch break has arrived. in this case, colin's behavior is reinforced on a schedule.

fixed-interval

Explanation:

Fixed-interval schedule: The term fixed-interval schedule is used in the operant conditioning technique. It is defined as the schedule of reinforcement in which the very first response to a stimulus is being rewarded after a particular time has been passed and it affects the behavior.

The fixed-interval schedule in operant conditioning, the interval time between two responses will be the same always.

In the question above, Colin's behavior is reinforced on a fixed-interval schedule.

b. the american revolution