Answer: Option A."Bar Graph"
Step-by-step explanation:
The best way to represent the given data is bar graph.
A bar graph is represented with rectangular bars which changes as per the comparative values or data.
Bar graphs are generally used to analyse the small or large changes in the data (variables) with respect to the changing time.
Hence, for the given data, weeks can be plotted on x-axis (time ) and plant mass (variables) can be plotted on y-axis in a bar graph.