Mark is playing with his friend, He makes a slashing gesture with his hand in the air as though he were using a sword, while calling out "Ha ha! I am going to get you!" Mark is most likely in which stage of cognitive development?

Preoperational

Explanation:

Preoperational stage, in psychology, is considered as the second stage in the cognitive development theory which was discovered by Jean Piaget, a well-known psychologist. The preoperational stage starts at two years of age and ends around age seven. A child who falls under this stage starts talking, learns to manipulate various symbols, and engages or involves in symbolic play.

As per the question, Mark is most likely in the preoperational stage of cognitive development.

answer; they are called (pebbling);

answer; emotional intelligence (ei);