The correct answer is "her". This is because an antecedent basically means to whom does the pronoun refer and the pronoun has to refer to Miss Kensington. This is why the correct form is her.
Something necessary or indeipensable: food shelter, and other necessities of life. The fact of being necessary or indispensable; indispensability: the necessity of adequate housing.
Answer:
Yes that is true many kids who are new to school feel alot of anciety and they create imaginary situations in their head about how people will laught at them For example a teacher asks you a question and wants you to come on board and answer it so you create imaginary situations in your head about you not knowing the answer and your classmates laughing at you