Answer: The topic sentence
Explanation: If the text is properly written, the topic sentence should either be at the beginning of the paragraph/text, or the end, if it is a short text; for things like the heading or title; words in special print; repeated words; things reiterated by pronouns; or ideas being suggested.
I think the answer is B because when he talks about the light dying from his eyes it refers to his death.
Reason and choice. I hope I helped!
The science of mental health an uncertain cognitive State