Step 1: Understanding the Concept:
Visual aids are used in extension teaching to support spoken words, but different aids are designed for different teaching depths and audiences.
Step 2: Detailed Explanation:
Let us analyze the educational depth of each visual aid:
- Posters (A): A poster is a single, large sheet designed to catch the attention of passers-by, convey a single striking message, and create an initial idea or awareness. Because people only look at it for a few seconds, it cannot contain detailed step-by-step instructions.
- Flash cards (B), Flannel Graphs (C), and Flip Charts (D): These are sequential, multi-sheet, or interactive visual aids used by an extension worker during small-group meetings to explain a practice in detail, step-by-step.
Therefore, only posters are limited to giving a brief initial idea.
Step 3: Final Answer:
Posters provide only an initial idea, matching Option (A).