In Boenninghausen's Therapeutic Pocket Book (TPB), the rubric "Death Apparent" refers to a state resembling death, such as suspended animation or a death-like trance. This is considered a general pathological state and a profound alteration of vital functions and sensations. Therefore, it is found under the chapter titled Sensations in Boenninghausen's TPB, which includes general morbid states and subjective experiences.
The other options are less likely:
\begin{itemize}
\item Aggravation lists factors that worsen symptoms.
\item Chest deals with symptoms localized to the thoracic region.
\item Fever focuses on symptoms associated with elevated body temperature.
\end{itemize}
Thus, the rubric "Death Apparent" is appropriately located under the Sensations chapter in Boenninghausen's Therapeutic Pocket Book.