What does a lower number on the magnitude scale mean?

(1) which phrase describes an important agricultural change that occurred during the mississippian period? (a) first cultivation of wild grains (b) expansion of marsh elder farming (c) spread of corn agriculture (d) gathering of nuts and berries (2) which group of native americans use northwestern arkansas as it’s traditional hunting grounds? (a) osage (b) quapaw (c) woodland (d) caddo

Which of the following statements about the migration of workers to other countries is false?

The increase of pollutants from in mexico has raised concerns about garage to health and the environment