Answer:
It is an example of shaping across different response topographies.
Explanation:
Shaping is defined as a useful, positive, systematic process used in experimental analysis of behavior. It is used to reinforce a desired behavior It is used when a new behavior is to be learnt and can be done across different response topographies. As in the scenario, there is successive progress from first lip movement to lip movement with sound then saying the word "gum" and finally "gum please".
