Final answer:
Rosa and Aisha are most likely engaging in cooperative play as they are working together, taking turns stacking blocks, and encouraging each other.
Step-by-step explanation:
Rosa and Aisha are most likely engaging in cooperative play as they are working together, taking turns stacking blocks, and encouraging each other. Cooperative play involves children playing together and working towards a common goal, as opposed to playing alone (parallel play), pretending or role-playing (socio-dramatic play), or competing against each other (competitive play).