A team of engineers is working together to design a new airplane. The team members each live in different cities. For which purpose is the Internet most useful to the team?

The internet is most useful to them because they use it to communicate.

Explanation:

If I were to send a message to my brother in Florida, through the internet, while I'm in Pennsylvania he would get it in minutes. On the other hand if I were going to meet him and then explain what I wanted to tell him in person it would take a much longer time.