An author can use descriptive words to have their readers visualize what they are trying to portray. For instance, by saying, "Tom ate a red apple." Your mind subconsciously sees someone eating a red apple. However, usually the author will be more subtle. In "To Kill A Mockingbird", the character 'Boo Radleys' home was described as have "rain rotted shutters", "off white", and "low, sinking to the ground with it's old age." This description shows you what his home was like, and creates an atmosphere of suspicion and maybe even fear.
If the title is "After Hours in Kindergarten" then the theme is about what goes on in a kindergarten's experience while in school. It provides the theme and tells you what you’ll be reading about.
I do not think they should be the villains. Thye just wanted to be the rulers of ther home. After all the garden was theres before it was a garden. Yes they are the antagonists but it is there home. It is not fair that snakes get such bad reps just because thy are snakes.
