According to the research, the correct option is a bar graph. It is the best way to show the lead levels in six contaminated water wells.
What is a bar graph?
It is a graph that is used to show the changes that the data have undergone by graphing the data in bars, representing the frequencies by means of columns (or bars), through their height in a Cartesian plane.
It is a way of summarizing a set of data by categories, allowing different values to be compared using bars of different sizes.
Therefore, we can conclude that according to the research, the correct option is a bar graph. It is the best way to show the lead levels in six contaminated water wells.
Learn more about a bar graph here: https://brainly.com/question/1814149
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