Final answer:
d) All of the above
The components of middle childhood development encompass physical growth, cognitive development, and social skills development; all are integral to this stage that spans ages six to ten years.
Step-by-step explanation:
The components of middle childhood development include physical growth, cognitive development, and social skills development. Therefore, the correct answer is d) All of the above.
During this stage, which covers the ages of six to ten years, children experience steady physical development in abilities such as agility, balance, and endurance.
They also show significant advancements in their ability to think in complex ways and in interacting more with peers, which contributes to their social skills development.