Answer:
I've not read Farenheit 451, but from the quote I believe it's trying to say "it doesn't matter what you do, as long as you impact it enough to be remembered" or something similar, though again I may be wrong as I've not read the book.
The purpose of informative/explanatory writing is to inform/explain something to the reader. Usually in an easier way or in a short summary of a text/passage.
Most of the competition that occurs in our ecosystem is basically just for survival. Breaking down into food supply, shelter, mate, etc. For frogs and birds, the thing that they are competing is the food supply. Given that they could live very near to each other, they will be competing for insects or other smaller animals.
The correct answer based on the given question above would be the third option. The model that suggests that our "self" has four aspects that control what we share with others is the "Johari Window Model". This model is a technique that aims to let people understand their relationship with themselves and with others. It was created by Joseph Luft and Harrington Ingham.