What do children do in the formal-operations stage that they do not do in the concrete-operations stage?

Question

Quizplus · Accepted Answer

In the formal-operations stage, children are able to develop a systematic strategy for solving a problem. This is a cognitive ability that is not present in the concrete-operations stage, where children are limited to dealing with concrete objects and events. The other options listed (understanding weight and volume, reaching around barriers, and distinguishing appearance from reality) all involve abilities that can be present in both the concrete- and formal-operations stages.

What Do Children Do in the Formal-Operations Stage That They