According to the context, it can be inferred that the sentence that explains how Alena wants to help people in need is: B. "A big part of what I want to do is viral immunology, and I want to advocate for underrepresented communities that lack health care," Alena said.
To identify the correct sentence in which Alena expresses her desire to help people in need, we must look at the details and the actions that she gives in each sentence. Additionally, to select the correct sentence we must choose the sentence in which the verb is a synonym of "help".
According to the above, we can infer that the correct fragment is option B because the main verb is "advocate" because this word is a synonym for helping, unlike the verbs "love", and "apply".
Learn more about verbs in: https://brainly.com/question/14574299
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