Basic Twitter query on followers

[Quartz]

I've had a Twitter account for a while. I've started to get fake and random followers. It's easy to block them, but I'd rather lock things down a bit. Is it possible to have to approve followers?

 

[KIA]

https://support.twitter.com/articles/14016-about-public-and-protected-tweets

 

[Quartz]

I said it was a basic query! Thank you.

 

[FBi7]

I use True Twit Validation to prevent unwanted or bogus accounts following me in conjuction with protected tweets.