___ is expensive because it requires a lot of electricity. O A. Dropping
O B. Seltzering
O C. Desalination
O D. Drinking

Ahis which describe the horizons in a soil profile? check all that apply. horizon a is mineral deficient. bedrock lies below the soil layers. te horizon o forms from organic material, horizon b undergoes the least amount of change. horizon c is least affected by the soil formation process.

Hurricanes a. usually form over land b. usually intensify over land c. gain strength from ocean heat d. usually form over the poles

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes. b. it burns more cleanly than crude oil products. c. scientists have developed new ways of extracting it. d. during its extraction, groundwater can be contaminated.