Under what circumstance would you use a pie chart?

A pie chart is particularly effective for displaying parts of a whole, which is why this choice is the correct answer. Each slice of the pie represents a portion of the total, allowing viewers to easily compare different segments relative to one another. This visualization is particularly useful when you want to show the composition of a dataset, such as the distribution of survey responses or market share among different companies.

While trends over time are better illustrated using line graphs or bar charts, continuous data often requires a different approach, such as histograms or scatter plots, where the data points can vary along a continuum. Discrete data can be represented using various types of charts, but pie charts mainly focus on showing how individual parts contribute to a whole rather than showcasing the individual data values themselves in a discrete manner.