As José begins to walk, he is also experimenting with sounds and with waving "good-bye." This is an example of how development:

Overlap

Explanation:

Overlap occurs during certain stages of a child's development. This phenomenon is characterized by the practice, learning or performance of 2 or more actions at a time, this actions may be interrelated. The action of speaking in other to wish goodbye overlap the waving action which also signifies a goodbye. Hence, theses actions portray a developmental overlap in José'sgrowth regime.

Therefore, we can can attribute Jose's development regime of walking while simultaneously experimenting with sounds and waving good bye as a development overlap.