This theory highlighted the important contribution of social, interpersonal and linguistic factors in facilitating children's mental development.

O a. Piaget's Theory
O b. Vygotsky's Developmental Theory
O c. Zone of Proximal Development.
O d. Scaffolding

b. Vygotsky's Developmental Theory

The theory that highlights the important contribution of social, interpersonal, and linguistic factors in facilitating children's mental development is Vygotsky's Developmental Theory. Vygotsky believed that a child's development is strongly influenced by social and cultural factors. He emphasized the role of language and interaction with others in the process of cognitive development.

To arrive at this answer, you can use the process of elimination by analyzing each option and determining which one aligns best with the given description.

Option a: Piaget's Theory focuses more on the individual's cognitive abilities and stages of development, rather than the influence of social and linguistic factors.

Option c: The Zone of Proximal Development (ZPD) is a concept within Vygotsky's theory that describes the level of skill or knowledge that a child can reach when given appropriate guidance and support from a more knowledgeable individual. While related to Vygotsky's theory, the ZPD alone does not directly highlight the important contribution of social, interpersonal, and linguistic factors as stated in the question.

Option d: Scaffolding is a term associated with Vygotsky's theory and refers to the support provided by a more skilled individual to a learner to help them progress in their development. However, scaffolding alone does not fully encapsulate Vygotsky's emphasis on the role of social, interpersonal, and linguistic factors.

Thus, the best answer is b. Vygotsky's Developmental Theory.

The theory that highlights the important contribution of social, interpersonal, and linguistic factors in facilitating children's mental development is b. Vygotsky's Developmental Theory. Vygotsky's theory emphasizes that social interactions play a vital role in cognitive development, and that language and social context are crucial tools for children's learning. Vygotsky also introduced concepts such as the Zone of Proximal Development (c.) and scaffolding (d.) to explain how social interactions and support from others help children develop new skills and knowledge.