The ability to mentally undo actions and understand that processes can be reversed?

• A. Classification
• B. Reversibility
• C. Puberty
• D. Identity vs. role confusion stage

Answer: (B)

Reversibility is the ability to mentally undo actions and understand that processes can be reversed. This cognitive skill develops in the concrete operational stage of development, typically in middle childhood, and it underpins the ability to perform conservation tasks and think logically about sequences of actions. For example, if you pour water from one glass into another and then pour it back, you recognize the amount remains the same; the action can be reversed to return to the original state. That capacity to reverse steps is what this item is capturing.

The other options don’t fit this specific cognitive capability. Classification is about grouping objects based on shared attributes. Puberty refers to the biological and psychological changes of adolescence. Identity versus role confusion is a psychosocial stage focused on forming a sense of self during adolescence.