Hello.
The answer is: Number
The pronoun must agree with its antecedent in number. Rule: A singular pronoun must replace a singularnoun; a plural pronoun must replace a plural noun. A pronoun should agree with its antecedent in person, number, and gender. Person refers to the quality of being, number distinguishes between singular and plural.
Have a nice day
Answer:
Meaning that the trouble that was made was all their fault. (I think, I hope it helped)
Answer:
This book is connected to today's society
Explanation:
Like that? I can change it if thats not what you meant