Read the paragraph below. Find the sentence that breaks the unity of the paragraph. Type the sentence below.The beaver has four gnawing incisors, two uppers and two lowers, that are rather...

Read the paragraph below. Find the sentence that breaks the unity of the paragraph. Type the sentence below.

The beaver has four gnawing incisors, two uppers and two lowers, that are rather ingeniously adapted to woodcutting. They grow constantly and wear with use to a chisel edge. The back side of the tooth, because it is made of a soft dentine, wears down, whereas the front side, outer-layered as it is with a very strong orange-colored enamel, doesn't. The beaver has lips that can close behind the incisors to keep the mouth free of wood chips and, when the beaver is gnawing underwater, water. The beaver is the largest rodent in North America.

Expert Answers
Ashley Kannan eNotes educator| Certified Educator

I would have to agree that the last sentence is probably the one that breaks the unity of the paragraph.  In echoing the previous thoughts, it's the one sentence that lacks the technical grasp and insight of the previous sentences.  This is not a reason to discount it by itself, but helps to bring out why continuity is broken with it.  The other sentences are more technically proficient regarding the teeth or the masticating abilities of the beaver.  The last sentence throws out the classification in a particular setting without much in way of connection with the other sentences.  Along these lines, there is a sense of internal transition within the previous sentences.  Teeth structure gives way to operational detail, and this gives way to a function of protection of such vital attributes.  The last sentence of "The beaver is the largest rodent in North America" breaks this level of internal connection within the paragraph.

susan3smith eNotes educator| Certified Educator

My guess is that the last sentence is the one that breaks the unity of the paragraph:  "The beaver is the largest rodent in North America."  The paragraph essentially concerns the beaver's teeth and, to a lesser extent, lips that make the beaver especially adapted to woodcutting.    The last sentence which should be the clincher sentence of the paragraph deals with neither of those subjects.  Instead, it seems to be an irrelevant comment about the beaver's size.  Had this sentence been at the beginning of the paragraph, serving as an introduction to the beaver, it would have worked much better.  But positioned where it is, it seems to drift away from the main ideas of the paragraph.

I hope this helps.