Approximately how long is the mississippi longest tributary

answer; i believe that the correct answer to the above question is; (tariff)

it would be d). more resources must be obtained to attain that combination of goods and services

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't

answer; microtheory;