What is the best way to paraphrase these lines

Aword that characteristics of both a verb and a noun

This device blocks an opening along the base/floor of stairs or other walking or working surfaces where materials or body parts might otherwise inadvertently fall through. it should be 4 inches high, with not more than ¼ inch clearance above the floor

What is the historical context of the diary of a young girl by anne frank? o the holocaust o world war i siege on sarajevo the american civil war