Answer:
I believe the best answer to be 1. Collegial collaboration.
Step-by-step explanation:
"Collegial" refers to the cooperative relationship between colleagues. "Collaboration" refers to the ability to work together in order to achieve a goal. As we can see in the description, the several teachers in King Elementary School are cooperating as they help their peers teach and build specific social skills with students. This collaboration makes the learning of those social skills easier, since they are reinforced in different classes and subjects.