1. Describe how Nina's special abilities helped her solve
the crime?
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Incomplete question. However, I assumed you are referring to the series called "Alphas" by Zak Penn.

Explanation:

In that series, Nina was one of the main character in the series who had special super hero abilities, such as been able to read lips, as well the ability to coerce others, etc.

To resolve the crime, Nina using her lips reading abilities, completely heard the conversation going on between the store manager and the robbers, this was key in helping her to solve the crime.

answer: "the beating heart symbolizes the narrator's conscience, or his sense of guilt and wrongdoing" so its b

explanation:

"to look at him, or hear him describe it, he had no guilt. however, poe decided to symbolize this man's subconscious guilt through the heartbeat."