The answer is Intumescent. I am pretty sure this is right.
I believe the answer would be the JPEG file extension.
William had to manually edit the data if he wants to remove the null values and incorrect column headers.
<h3>What is data editing?</h3>
Data editing is known to be a term that connote the act of making changes, reviewing or adjustment some survey data.
Note that by editing one can remove want one do not want from a group of data and as such, William had to manually edit the data if he wants to remove the null values and incorrect column headers.
Learn more about data from
brainly.com/question/26711803
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C)Hydroelectric I believe.
