Final answer:
To list the gases based on percentage, use the Descending option along with the Text and Percentage Field options.
Step-by-step explanation:
To list the gases based on the amount of the gas found in the atmosphere from largest to smallest percentage, Hope needs to use the Descending option. This will arrange the gases in the order of decreasing percentage. Additionally, she should use the Text option to input the names of the gases, and the Percentage Field option to input the percentages of each gas.
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