In rural areas, understanding is enhanced through visual and hands-on learning. **Demonstrations** allow people to see the technique being performed step-by-step, making it easier to follow and replicate. Unlike lectures (A), which are passive, or flash cards (D), which are static, demonstrations engage learners actively. Role play (C) is useful but less practical in large rural populations. Chalk and talk (A) is limited by literacy and attention spans.

Demonstrations are most effective because they combine clarity, simplicity, and real-time feedback—key for low-literacy, resource-limited settings.

**✓ Correct: B. Demonstrations**