Think about it...what is the plural of foot ? Is is not foots...it is feet...irregular plural noun
I am not 100% sure, but I would say that the sentence which best describes the theme of this work is A) People aren't always what they seem.
A suggested meaning of a word that differs from the dictionary meaning is called a connotation.
It is also the theoretical definition or purpose of a word, that makes a policy on circumscribing whichever things or ideas it refers to.
Answer:
My sister live in a big house with big garden.
The cat is playing under the tree.