I am kind of unsure about what word is underlined but as a guess Im thinking the underlined word is "pacify". I would say change it to soothe and make the sentence "To soothe the crying child, his mother sang a lullaby to him"
Google steps of writing an essay and it will give you this: <span>Pick a topic Prepare an outline or diagram of your ideas Write your thesis statement Write the body Write the introduction Write the conclusion <span>Add the finishing touches.</span></span>
