Barbed wire entanglements were often 40 yards (36m) from the front trench. considering the types
of weapons used on the western front, what would be their main defensive function?

Barbed wire played a very significant role in World War I (also called the Great War). Barbed wire was originally used as a boundary to keep cattle in, but it soon proved to be useful in trench warfare. Barbed wire served both as a way to keep the enemies out, and as a way to keep the soldiers in (and protected). The use of barbed wire was the cause of many casualties and injuries, as well as a contributing factor to the stalemate of the war.

d is the answer. leo should include the source.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."