Formal operational stage includes abstract thinking.

• A. Concrete thinking
• B. Sensory memory
• C. Procedural memory
• D. Abstract thinking

Answer: (D)

The formal operational stage is characterized by the ability to think without needing concrete objects, embracing abstract ideas, hypothetical scenarios, and deductive reasoning. This marks a shift from reasoning tied to real-world experiences to manipulating symbols and concepts, testing hypotheses, and considering possibilities that aren’t physically present. That’s why abstract thinking best fits this stage.

Concrete thinking describes reasoning tied to tangible objects and direct experiences, which belongs to earlier stages. Sensory memory is about briefly holding sensory impressions after a stimulus, not about how we reason at a developmental level. Procedural memory involves knowing how to perform tasks (skills), not the kind of abstract, hypothetical reasoning seen in formal operational thought.