From the Looks of it you might want to take notes of important information and look for the themes in the texts and then explain that and then pull out some important messages and then use the evidence from the texts to provide evidence to these claims and they will be your supports
Here's a few sentences with 'a'.
Billy helped a girl find her lost cat.
Georgia found a stray cat in an alley.
Remi got a suitcase for her birthday.
Answer:<em> non-living</em>
Explanation: something like not or none
I believe that the question you should ask in order to understand an author's diction is What do these words have in common with each other?
Diction in literature is the choice of words, so I'm assuming this answer is correct.