Need the answer of bottom spaces of #46

What if i told you.. you could get free points and brainliest for answering this one drivers ed question ! hurry : ) to begin measuring your following distance, watch as the rear end of the vehicle ahead passes a. the rear end of a vehicle on the right b. the front end of an oncoming vehicle c. a fixed point on the road d. a distant landmark

A. describe the model of urban structure most often observed in mega-cities in developing countries. explain how this model differs from common urban structures in north america. b. describe at least two factors leading to the growth of mega-cities in developing or least-developed countries. c. identify and explain two factors that led to the formation of squatter settlements in mega-cities in developing countries.

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.