Which modern technology would you consider most useful and why?
This is so hard to answer because "modern technology" is such a broad term... But to answer your question I'm going with the internet. The internet has opened so many doors. It's so useful to everyone and for everything. I mean... just imagine a day where the internet crashes around the world. Imagine the chaos. Many people depend on it for important stuff. I, for example, depend almost entirely in the internet to study.