Answer:
Option C:- It does not maintain the same tone throughout.
Explanation:
In this paragraph, both advantages and disadvantages of cell phone are discussed. This paragraph deals with advantages and disadvantages both at the same time so it does not maintain a constant tone throughout the paragraph. Disadvantage of cell phone is that it distracts the young people whose focus should be on education. Also it states about the advantages of cell phone like it helps the students to connect with their parents. Further it also helps in taking pictures with friends. Thus it talks about both advantages and disadvantages simultaneously, not maintaining the same tone throughout.
Both words can be used as either nouns or verbs, so that's not a foolproof distinction. But “affect” is almost always a verb
