I think trenches had zigzag patterns because they could make people had a better aim at shot and more protection.
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The centre (or center in the United States) in ice hockey is a forward position of a player whose primary zone of play is the middle of the ice, away from the sideboards. Centres have more flexibility in their positioning and are expected to cover more ice surface than any other player.
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Answer:
by helping and having services for the citizens that they can use or have if they need.
Explanation:
