1. why did the new england colonies not base their economy on agriculture?

The New england colony did not base their economy on agriculture because the terrain of the area was not suited for farming, but they did however have plenty fish available.  

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.

the answer is option a.