A \texttt{box plot} is an effective method for comparing two or more distributions on the same set of axes. It displays the minimum, first quartile, median, third quartile, and maximum values of a dataset, making it easy to compare the spread and central tendency of multiple distributions. While histograms and frequency polygons can show the shape of a distribution, box plots provide a concise summary of multiple distributions, making them ideal for comparison. Thus, the correct answer is \texttt{Box plot.}