A) To identify the focus of a paragraph.
The purpose of a topic sentence in a paragraph is to let the reader know what the paragraph will be about.
<span>The Houyhnhnms made a huge impact on Gulliver's fourth voyage because it was where we was exiled and live among its kinds, which is of course, due to the vile ape-liked creatures, the Yahoos.
I hope my answer has come to your help. God bless and have a nice day ahead!
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Third evil tendencies are early shown