What stop the spread islam in southern africa

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

Regarding most of the narrator’s story, which word best describes the tone?

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.