Baby Alex has learned the word "dog." He has referred to cats,horses,dogs,and cows as "dogs." Baby Alex has formed a(n)

A) algorithm.
B) heuristic.
C) frame.
D) concept.

Concept

An abstract idea or a mental symbol that represents a specific thing, suitable for categorization or understanding.

Algorithm

A step-by-step procedure or formula for solving a problem, often used in computer programming and mathematics.

Frame

in the context of psychology, involves the perspective or angle from which a situation or concept is perceived and can significantly affect decisions and judgments.