Correct sentence (best): A toucan’s long beak helps it reach berries on the thinnest branches.
Also correct (less direct): A toucan’s long beak can help it reach berries on the thinnest branches.
Why these are correct:
- "toucan’s" has an apostrophe because the beak belongs to the toucan.
- Using "helps" states the fact simply. "Can help" is also okay but sounds less certain.
- "It" refers to the toucan.
- Remember to end the sentence with a period.
Short grammar parts: Subject = "A toucan’s long beak", Verb = "helps", Rest = "it reach berries on the thinnest branches."