What is used for emphasizing or changing a topic within a sentence?

if you need to emphasize a word or a particular fact in a sentence, you can use italics to stress it. That said, italics and other font changes lose their impact if overused. It is best to use such devices sparingly and rely on strong writing and strategic word placement to get your point across

Explanation:

the answer is a because the astrophel does more and sidney goes to the astrophel more than stella.

the answer is b. the tomb is underground and dark, and its opening is covered by a heavy grate.