Once pairing has taken place, the teacher can become a .

The correct term to fill in the blank would be conditioned. Once pairing has taken place, the teacher can become a conditioned reinforcer. By pairing something repeatedly with reinforcement, you could condition it to be a reinforcer. It is also called as a secondary reinforcer. These are stimuli or events that would become reinforcing because it is being associated with a primary reinforcer.

Answer/// absolute and unchanging laws;