Reasoning, thinking and problem-solving are explained in which aspect of development?

Correct option is A

Reasoning, thinking, and problem-solving are core components of cognitive development, which refers to the progression and maturation of mental processes. Cognitive development involves the growth of intellectual abilities and how individuals perceive, think, understand, and manage the world around them. Jean Piaget's theory of cognitive stages and Lev Vygotsky's social-cultural theory both emphasize these processes in their explanations of how children develop intellectually over time.
Information Booster:
(b) Moral Development: This concerns how people learn to decide what is right and wrong and understand ethical behavior, primarily studied by theorists like Lawrence Kohlberg.
(c) Motor Development: Focuses on physical growth and the ability to use muscles for various activities, including fine motor skills like writing and gross motor skills like walking.
(d) Social Development: Deals with how individuals learn to interact with others and navigate social contexts, including the development of friendships, understanding of group norms, and other interpersonal skills.