The answer is the last choice, or D.
When you summarize, you're supposed to gather the most important points and rewrite them in a shorter and more simplified fashion. The first three choices include mostly everything you should do when writing a summary. Usually when you summarize, it's for a concluding paragraph, so writing an introductory paragraph wouldn't be it.
They can lose interest in school, get lower grades and even fail.
Social media appears to have a range of benefits. It provides a way for many of us to connect with others. We can support other people and feel supported by them. It may even be a useful way for those with social anxiety and those who have a hard time with face-to-face interactions to connect with others.
