Is it easy to sing gregorian chant?

Which act is an example of total war?

What does the document of the birtish octopus is an uderlying cause of the world war 1

This photo shows an early mesoamerican structure, specifically from the zapotec culture. what was this structure most likely used for? a. creating terraces for farm fieldsb. practicing religious ceremoniesc. playing a ball game with stone hoopsd. protecting a city from invading armies