The purpose of the ad is to encourage people to take steps to avoid illness, as shown in the last answer option.
We were able to reach this answer because:
- The announcement shows how prevention measures must be followed to avoid the spread of diseases.
- This is done to ensure the safety of the population, avoid overburdening the health service and protect those most sensitive to infections.
Thus, the advertisement fulfills a public service function which is to promote the protection of society.
More information about the public service at the link:
https://brainly.com/question/14452199
