Step 1: Understanding the Concept:
Visual aids are tools used in agricultural extension to make teaching and demonstration more effective. They are classified based on their presentation style and nature.
Step 2: Detailed Explanation:
- Visual aids are broadly divided into projected (slides, films) and non-projected (charts, posters, models) aids.
- A Model is a three-dimensional representation of a real object.
Models can be scaled up or down and are placed in exhibition areas or booths to be looked at.
- Because they are set up for audience observation during demonstrations, models are classified as display-type non-projected visual aids.
Step 3: Final Answer:
A model is an example of a display type of visual aid.