What will repeated word or phrase usually indicate in a primary source?

Match each person with his contribution. aristotle socrates eratosthenes hippocrates he studied the causes of illnesses in search of cures. he created a teaching method that involved asking questions. he determined that earth was round. he educated alexander the great.

France allied itself with america because a -the american rebels had modeled their movement after the french revolution b- france wanted to weaken britain c- france wanted to wanted to regain louisiana d- the french needed american support in their war with the native americans

Which is true about domesticating plants and animals?