PLEASE PLEASE PLEASE HELP
i need to bring my grade up asap!
( 20 points + brainliest )

What is the border between layers a through f and layer g called?

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

What is the term for a government where power is carefully divided between a central government and several regional or provincial governments? a.) unified or central government b.) federal government c.) confederate government d.) republican government