Correct Answer: Both assertion and reason are true, and the reason is the correct explanation of the assertion.

Solution : The correct option is (a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.

The assertion that investment in early childhood education has long-term benefits is true. Research has shown that providing children with quality early childhood education yields significant long-term advantages. Early education helps in the development of cognitive and social skills, such as language acquisition, problem-solving abilities, social interaction, and emotional regulation, which are crucial for future success. These skills serve as a foundation for further learning and development throughout a person's life.

The reason provided states that early education helps develop cognitive and social skills crucial for future success, which is a correct explanation of the assertion. During the early years, children's brains undergo significant development, and providing them with a stimulating and nurturing learning environment supports the growth of essential cognitive and social abilities. These skills contribute to academic achievement, social adaptation, and overall well-being in later stages of life.

Therefore, both the assertion that investment in early childhood education has long-term benefits and the reason that early education helps develop cognitive and social skills crucial for future success are true, and the reason is the correct explanation of the assertion.