Guess what the answer is before reading the thread...https://twitter.com/Arshadyousafzay/status/1115299764453695488 …
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
It’s not one of the options. That’d be too easy for an exam question 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.