Answer: Means-end behavior
Explanation: Means-end behavior refers to behavior showcased in infants which involves putting ideas together in other to achieve a goal. It might also involve forfeiting a particular object or thing in other to achieve or accomplish another.
In the scenario above, Dominic showcases a Means-end behavior by making sure he got hold of the toy he wishes to play with despite the fact that it wasn't easily achievable. He developed the cognitive sense of using what he has to get what he want by dragging the needed toy with the toy he already has in hand.