Which figure of speech is used in these lines from william shakespeare's romeo and juliet

not concrete, existing in thought or as an idea but not having a physical or concrete existence

either online or traditional classroom can work for students. which is better will depend on students and teacher. students may have trouble following a lesson in classroom while they can study at their own pace online. other students may have trouble staying focus on their own in online classes. teachers are more used to classroom teaching but they may also be more worry about their jobs teaching online classes and work harder.

the power of