Helena has an infectious laugh that quickly makes everyone around her start to laugh as well. what part of speech is infectious?

Read the excerpt from "a pair of silk stockings." but she went on feeling the soft, sheeny luxurious things—with both hands now, holding them up to see them glisten, and to feel them glide serpent-like through her fingers. which best describes the underlying tone of the excerpt created by the connotations of the words “soft,” ”luxurious,” “glisten,” and “serpent-like”? 1. gloom 2. temptation 3. forgiveness 4. suspicion