Final answer:
The most important mode of learning for preschoolers is play, which serves as a comprehensive tool for learning social norms, cognitive development, motor skills, and problem-solving.
Step-by-step explanation:
The most important mode of learning for preschoolers is d. Play. Through play, children explore their environment, learn to interact with others, and develop critical cognitive skills. For instance, preschoolers playing in a sandbox aren't just having fun; they are also learning about physical properties like texture and volume, understanding social roles through cooperative play, and enhancing their motor skills.
Play is an integral part of a child's development, as suggested by the American Academy of Pediatrics. It allows children to build creativity, problem-solving skills, and form social relationships. Additionally, pretend play supports the development of symbolic thinking and helps preschoolers to exercise their blossoming curiosity by asking questions such as 'Why?'. Play also teaches children implicit rules of social conduct and cooperation, preparing them for formal education and eventual workforce integration.