a. They usually have a smartphone and use it to chat with friends, post photos and videos, and play games. b. Some parents think that using the internet too much like that is bad for teenagers. c. Teenagers today spend a lot of time online. d. However, others think it is just a normal part of life in the 21st century. e. They also use social media sites like Instagram and Snapchat or watch TV shows and movies on streaming services such as Netflix and Hulu.