Respuesta :
The correct answer is a map showing the changes in the area covered by ice over time
The visual aid that would most help a speech about melting polar ice caps is C. A map showing the changes in areas covered by ice.
What is visual aid?
visual aid can be regarded as those objects or element that can be used in explaining some information to the audience.
Therefore, this visual aid can be photos, videos as well as map and others.
Learn more about visual aid at;
https://brainly.com/question/3610367
#SPJ2