During the past 40 years, close to 20 percent of the amazon rain forest has been cut down, more than in all the previous 450 years since european colonization began. scientists predict that an additional 20 percent of the trees will be lost over the next 20 years. the amazon rainforest, like other rainforests, produces half its own rainfall through the moisture it releases into the atmosphere through transpiration. eliminate enough of that rain through deforestation, and the remaining trees dry out and die. other problems result from the deforestation of rainforests. one can be seen here. deforestation leads to many negative situations on earth, as illustrated by this satellite image. all but one is a consequence of the deforestation of the rainforest. that is: a) deforestation leads to the extinction of species. b) deforestation leads to a decrease in fossil fuels. c) deforestation leads to bare soil that is easily eroded. d) deforestation leads to the destruction of many wildlife habitats.

Archeologists have discovered three sites showing conclusive evidence for the mastery of fire in tanzania, from a period slightly after the time that homo habilis was present in africa. these sites clearly were founded by homo erectus, the descendent species of homo habilis that migrated north, out of africa and into asia. homo erectus was known to have mastered fire, from ample evidence at sites in asia. there is no reason to attribute mastery of fire to homo ergaster, the descendent species of homo habilis that remained in africa.which of the following is an assumption on which the argument depends? (a) before their migration, homo erectus occupied african territory as far south as tanzania.(b) the strain of migration provided the selective pressure motivating homo erectus‘ mastery of fire.(c) homo ergaster would not have derived as much benefit from the mastery of fire as did homo erectus.(d) homo ergaster inherited all cultural knowledge from homo habilis, a species that did not have mastery of fire.(e) homo ergaster did not occupy regions as far south as tanzania until well after the time of these three sites.