What governs peak periods for learning new and difficult academic material?

Which is not a nation of southeast asia? .

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

The political viewpoint of a newspaper can be learned by reading the comics front page sports section editorial page