Which of the following is the meaning of the suffix “-algia”?

“-algia” means “having to do with pain.” For example, “fibromyalgia” means “having to do with muscle pain.”
"Having to do with plants" is incorrect. The suffix “-algia” just looks like the word “algae” so it’s incorrect.
"Spreading rapidly" is incorrect. There is no suffix with this meaning. Rather there is a prefix with this meaning.
"A person who treats pain" is incorrect. This meaning is usually indicated by “-ist,” “-ar/-er/-or,” “-ant,” or ”-ian.”