Thank you, Philip and Nona.
Basically I don't have much disagreement with his point of assertion. I am curious why he used the articles as he did when normally an article 'a' would be good for all those places underlined.
Then I thought he might be doing it (I mean 'putting the article 'thes' in all the places underlined) 1)because he is doing the sort of defining (similar to definitions in a dictionary). He could be using 'thes' 2) because he thinks he is talking straight to you like when you are conversing across from each other.
Ex for case 1:
Earth is the staging area. (An watermelon is a big round fruit that has a lot of fluid.(I mae this up) -- Of course, 'Earth' seems to be uncountable and the 'watermelon' is countable.
Mulling over this, I feel the FIRST case as shown above seems more credible. What do you think?
(Note: There was a minor typo in the original quotation and it should be 'of' not 'fo' before the word 'death'.)