All travelers are not tourists because tourists are people who travel somewhere for their own purposes like a vacation, for example. Travelers could go visit a place for other purposes, such as a business trip.
I'd go with However because it is hot, BUT they can't complain. It's the most logical one
However is just another word for BUT.
The behavior of the characters.
Triangle is described as a carefree and “pointed” character. Square, on the other hand, is shown to be angry in emotion with “each of his corners turn[ing] pepper red”.
B is the answer to your question
<span>rhetorical methods are describe the variety, conventions, and purposes of the major kinds of language-based communication, particularly writing and speaking.</span>