Respuesta :

Primary sources are sources of information that were created at the time under study.

Secondary sources are everything else. They write/talk about the study but were not created at the time.
a primary source is like say a picture of someone farming cuz they were there or say a diary cuz that person witnessed something firsthand.and a secondary source would be like a text book cuz it didnt witness the thing its teaching its was written by someone who just heard about something. 

hope i helped :)