Which detail would be relevant to this main idea? There are many fun things to do at the beach: It is fun to walk along the shore and look for shells.. Which detail would be relevant to this main idea? Even though they sit still for long periods of time, frogs can actually move pretty quickly: A frog's tongue can roll out and catch a fly in less than a second.. Which detail would be relevant to this main idea? Amelia Earhart is famous for being the first woman to fly across the Atlantic Ocean: She was able to cross the Atlantic Ocean in only 21 hours.. Which detail would be relevant to this main idea? Weather reports need to be correct so that people can prepare for bad weather: Weather reporters study many satellite images before preparing their report on the news.. Which detail would be relevant to this main idea? Getting the right dog depends on where you live: If you have a big backyard, you might want to get a large dog.