In sq3r reading titles and headings in order to get an overview of what lies ahead is reading passage is called

That would be surveying.

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."

because most jews were in the concentration camps and dying horrible deaths while anne could be with her family in a warm place with shelter, food, water, and a place to sleep.