They are called homonyms.
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Love is the root word of lovable
This is correct. Your thesis statement is the base for your entire essay. Hope this helps!
This is more of an opinion based question, you aren't really going to have a right or wrong answer. Personally, I believe everyone should be able to decide whether or not they want to recite our pledge. I stopped standing for the pledge and reciting it in 6th or 7th grade.