Viewing the child as a thinking moral being who wonders about right and wrong and searches for moral truth is the approach endorsed by

cognitive-developmental theorists

Explanation:

The cognitive development refers to the development of the thought processes and thinking ability of an individual. The cognitive development also helps people to understand and interact with the world.

The theory of cognitive development was developed by Piaget.

As a child grows, he learns to differentiate between what is good and what is bad. The child learns to think morally and searches for the moral truth.

Thus a child who is wondering about the right and the wrong searches for the moral truth is endorsed by the approach of the cognitive-developmental theorists.