The below word pairs are all homonyms. Identify which ones are homographs, homophones, or both:

Present/Present
Spring/Spring
Flower/Flour

Present is a homograph but not a homophone. Although it is spelled the same, when used as a verb it has a different pronunciation from its noun and adjective meanings.
Spring is both a homograph and a homophone, because it is spelled and pronounced the same across all of its noun and verb forms.
Flower and Flour are homophones but not homographs, because they sound the same but are spelled differently.