Bob's dog has been taught to catch a Frisbee by reinforcing small steps from sniffing the Frisbee to running with it to finally catching it when thrown. This is an example of

The correct solution will be "shaping or successive approximation".

Explanation:

Shaping or gradual evaluation involves teaching and understanding the desirable behavior (trying to educate in this particular instance) by emphasizing tiny adjustments against this successful shot on target/particular behavior.Shaping becomes believed to be an important teaching method since action could not be punished unless someone happens initially.

So that the given scenario is the example of the above topic.

Ibelieve appendix i maybe wrong