Given that it is 'free,' it can exist alone and doesn't have to have either prefixes or suffixes added to it in order to exist as a word. A root is the smallest part of a word (when you take off prefixes and suffixes) that still has a meaning.
For example: unbelievable - here, the root is believe, the prefix is un- and the suffix is -able.
can you show my a paragraph so i can read, then answer it? it would be thx!
to and without are prepositions, so a, b, and d are prepositional phrases. the adverb phrase is c, about the surprise.