The sentence which best states the main idea is an option(a) i.e, By doing a little research about an ergonomic workstation and then making small changes to your work area, you can prevent muscle strains and tension, headaches, pinched nerves, and other physical disorders.
The main idea is the major message the author wants to get over to the audience. According to the main notion, what does the author want me to understand about the subject? or "What lesson is the author attempting to impart to me?" The author typically states the main point in a single sentence.
There is a main idea or fundamental idea in every sentence. The central premise of the paragraph is the most important thing the author wants you to comprehend about its subject. When writers write, they have a message in mind that they want to get across.
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