Answer:
Open-pit mining, also known as open-cast or open cut mining, is a surface mining technique of extracting rock or minerals from the earth by their removal from an open-air pit, sometimes known as a borrow.
Explanation:
Maya and Inca but Aztec could be in there too
Explanation:
The Incas performed child sacrifices during or after important events, such as the death of the Sapa Inca (emperor) or during a famine
Generally only high status prisoners of war were sacrificed, with lower status captives being used for labour. Human sacrifice among the Maya is evident from at least the Classic period (c. AD 250–900) right through to the final stages of the Spanish conquest in the 17th century.
In addition to slicing out the hearts of victims and spilling their blood on temple altars, the Aztecs likely also practiced a form of ritual cannibalism. An Atztec human sacrifice atop the Mesoamerican temple pyramid.
No, 21 days would be not enough because it takes at least one month to observe all of the moon's phases.
The answer is hill hope it's helps