Which of the following innovations would be MOST likely to help African farmers?

Development of frost-resistant strains of seeds
Invention of grain seeds that grow in hot, arid climates
Introduction of farming methods suited to growing food in limited space
Development of chemical fertilizers that improve nutrients in the soil

Describe the relationship between population growth consumption and the environment.

Which of the principles do you feel is more important for our our american society? respond in 3 sentences. (principals: popular sovereignty, republicanism, federalism, separation of powers, checks and balances, limited government, or individual rights)

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.