The main purpose of the hotel reservation system is to ensure that there are enough rooms available for those who wish to occupy a room in a hotel, by organizing a list of those who have already booked.
Your answer is most likely correct
Answer:
trench warfare is the type of warfare described in the passage above.
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I don't know if you were provided answer choices, but the phrase "The Pueblo people used irrigation methods such as building dams and tanks to store water." is the best example of how they modified their environment.