Tara is a documentary filmmaker she was hired to make a film about an archaeological dig. she took many close up shots of a archeologists uncovering precious artifacts the film she made can be classified as a source
- primary
- secondary

i think it is a system for harvesting crops more easily

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.