They used rhetoric using ethos pathos logos they wanted to persuade the audience inform them. They appealed to a lot of emotion
Backyard gardens seems a bit broad whereas the rest focus in on a certain subject relating to gardens.
I think that The answer is b.
The correct answer would be B, since complex sentences have 1 independent variable and one dependent variable.
The dependent variable would be: Everytime he hears a siren
Why? Because it is not a complete thought.
The independent variable would be: My dog howls loudly.
Why? This statement is a complete thought.
A would be a compound sentence
C would be a simple sentence
D would be compound complex.
Hope I could help!