How do the phrases "boiler-deck," "hurricane-deck," and "texas deck" affect the passage? they highlight twain's familiarity with the parts of a steamboat, which gives the passage a more authoritative feel. they underscore twain's love of dialogue, which gives the passage a freer, more conversational feel. they demonstrate twain's trust in the reader's knowledge, which gives the passage a more intimate feel. they suggest twain's creativity and sense of humor, which gives the passage a more lighthearted feel.

They highlight Twain's familiarity with the parts of a steamboat, which gives the passage a more authoritative feel.

Explanation:

This is the best description of the effect these words have on the text. In this passage, we learn about the names that Twain uses in his description of a steamboat. The variety of names he employs suggest that Twain has great knowledge of the parts of a steamboat, and this gives the passage a more authoritative feel.

the answer is academic paper

and the second should be college professor