What was the main purpose of trenches? to create a diversion to confuse the enemy to provide protection from bullets and bombs to hold prisoners of war and bury the dead to collect water for drinking

To provide protection from bullets and bombs is the correct answer.

the decreasing neutrality of the u. s. in world war i

hope this : )

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."