Light travels in a straight line until what happens?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Monitor and apply fix up stratorgies

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half