Chapters 1-3
IT
Her body transformed into something resembling a marble white body?
Who is Mrs. Whatsit
What happened to Charles Wallace when he looked into the eyes of the man sitting in the chair?
Charles Wallace was controlled by IT.
Aunt Beast
Meg's gift that defeated IT
Love
They held flowers to their faces.
What assisted them with breathing?
Physical and meta-physical trauma. Due to the Black Thing's evilness and despair, it harmed Meg emotionally and physically.