Mrs. Sims polled her students about which social media app they use most. Which type of chart would best display this data?

Pie chart

Explanation:

Among all the other charts, Pie chart is commonly used to find the largely used, and scarcely used items in a quick phase.

This stands best do survey. Here is also a situation given in the question as like, the teacher has given the list of social media and the children are polling on to it.

So a line chart would definitely show good representation but it wouldn't be an effectual visual appearance for survey kind of approach.