Concept:The range is the simplest measure of dispersion that directly depends on the largest and smallest values in a data set.Explanation:To find the tallest tree, you need to identify the highest value among all the trees.The range is calculated as the difference between the maximum value and the minimum value.Since the range involves the maximum value directly, it is the most suitable measure for comparing the tallest tree.Other measures like variance, standard deviation, and mean deviation focus on spread around the average, not on the single highest value.Answer:Range.