Discoveries in which field of science contributed most to the population booms of the 1800s

a. agriculture

b. medicine

c. communication

d. transportation

Match each idea to the correct principle of government. federalism separation of powers checks and balances divides the powers of government into different branches arrowright divides the powers of government between central and state governments arrowright each branch of government has certain powers that prevents the abuse of power on the people arrowright