In the Microsoft publisher application (as well as many other websites such as Brainly, Google docs, etc), words underlined in red are spelled incorrectly.
Whether you spelled it incorrectly or did not complete the words, as long as the word is not found in the dictionary, the word would be underlined with a red squiggly line.
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Well potential energy is energy that is in a object while its not moving so i would go your third option
Both yeah and no, depending on personal opinion
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