Read the following poster on dengue, from the Pan American Health Organization (PAHO), and answer questions 28, 29 and 30.
Figura 2

Source: <https://www.paho.org/en/documents/poster-dengue-warning-signs-jpg-version> Consulted on Sept.13, 2024
When using advertisements to teach English as a Foreign Language (EFL), which of the following is NOT an effective teaching strategy?