Why ww1 is so difficult to fight?

Some World War One soldiers, like this Canadian, were obviously children. In many nations, especially those in the Central Powers, it became necessary to accept any able-bodied male, from preteens to elderly men. Others lied about their ages to join. Many people born in the late 19th century didn’t have birth certificates,

Explanation:

answer; /// i do believe that its napolean's conquest of spain;

your answer will be b. improving roads, bridges, and other infrastructure. hope i !