Final answer:
Alejandro's ability to recognize he can build a tower with blocks while maintaining the original shape is an example of constructive play in cognitive development.
Step-by-step explanation:
Alejandro's ability to recognize that he can take a group of blocks and build a tower, while still maintaining the original shape of each individual block in his head, is an example of constructive play in cognitive development.
This type of play involves children using objects and materials to create or build something, while also understanding that the objects themselves remain unchanged.
Similar to the example provided, when a child like Abdul learns the schema for dogs based on their own experiences with a Labrador retriever, they can assimilate other dogs into that schema and recognize them as dogs as well.