What was crop rotation designed to do

Which of the timelines above accurately represents the order of historical events in canadian history? a. one (1) b. two (2) c. three (3) d. four (4)

Put these ecosystems in order of least biodiversity to most biodiversity 1. mediterranean forest 2. indonesian rain forest 3. arctic ocean

Seasons are a result of: a.) earths rotation on its axis b.)earths tilt on its axis c.) global air circulation patterns d.) global humidity circulation patterns