As she researches, which of the following sources is
most credible and relevant for her purpose?

Using a variety of sources for a research is very important because it essentially helps to explore the variables of the research completely from different angles and perspectives.

Explanation:

the correct answer is "the rhythm and rhyme scheme add to an eerie and suspenseful tone". poetry is literature written in stanzas and lines that use rhythm to express feelings and ideas. poets will pay particular attention to the length, placement, and grouping of lines and stanzas. this is called form. lines or whole stanzas can be rearranged in order to create a specific effect on the reader.

idk what to tell you bro im mainly here just for points hopefully someone actually gives you the answer you are looking for