Answer:
Decline in immunity.
Explanation:
Immune system is the ability of a human to destroy harmful virus. It is the antibodies which are present in the human body which enables the human to fight the diseases. It helps to detect and correct the cell which upfront any virus or bacteria.
He relays most on Historical events
Answer: The Girl I Use To Be
Explanation: Olivia Reinhart is the main character of this book. This character stood out to me, because she showed dedication. Even though, her mom was killed and her dad disappeared years ago. She still remained committed and dedicated to solving what happened years after. Olivia was clever and wise in this book.
Please mark me brainiest :)