Is "peck of wet fish net"
consonance or assonance

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.

"urban sprawl, the spreading of large developments of housing and shopping areas around a city’s center, has many negative cultural and environmental effects. " (from your link)

so, your answer is: it has a negative effect on the environment, otherwise known as c~hope this mate. 

the statement that identifies the central idea of "the salem and other witch trail hunts" is d. while witch hunts may feel like a rare occurrence, mike kubic proves that such   incidents are not as uncommon as we originally thought.

the author is trying to show that witch hunts come in various forms and are produced by the fear of what isn't understood or it's different.