Avoiding or escaping a feared situation reduces anxiety and ends up

reinforcing the phobic behavior
encouraging the person to seek treatment
aggravating the symptoms of the disorder
minimizing the anxiety until it disappears

the speed increase from w to x due to increased gravity force

the speed decreases from x to y due to decrease in gravity

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.