The main idea is more specific than a theme . The theme could be food and the main idea might be that people need to be more careful about what they eat .
Hope that helped
Greek and Latin matter because it helps us with the pronunciation of words and the origin of words. When we know about where these words come from, how they are broken down (with suffixes and prefixes), and how each are pronounced, you better understand not only the word, but the meaning and the logic behind the word. This also aids in reading comprehension. Greek and Latin is key to understanding vocabulary, and a good vocabulary helps you to understand what you are reading.
The cafe cozy and was buzzing noisily with activity.
