The thesis statement is the first sentence of this paragraph, it should be the last sentence of an introductory paragraph.
the key
the campus
the scales the numbers on the sides of it
Could be the last three tbh one of those
The correct answer is D) There is no single topic sentence. a topic sentence is used to summarize what the writing is about, and there is no sentence that does that in this piece.
Vestigial usually refers to traits which over evolution have lost their main function and are less useful than they once were.
In number one Hunter means that he thinks the teeth were from the ancestor whale shark but are now useless or nearly useless to the current whale shark.