One of the main ways that humans can cause a desert to appear where one did not exist before is by blank

How can animism be described? a. the belief that one should be mummified after death b. the belief that all natural things are spiritual c. the belief that there is more than one supreme being d. the belief that there is no afterlife

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer