What u. s. states are part of the corn belt, dairy belt, fruit belt, ranching belt, wheat belt, and specialty crops belt?? this is an ap human geography and history question. my assignment is due tomorrow. please help

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.