Why do many environmental agencies promote conservation of water even though a large portion of earth's surface is covered with water? 1) there may be a shortage of clean drinking water in the future. 2) they fear that all water on earth will be used up one day. 3) they wish to increase navigation in conserved water. 4) conserved water can be used to generate electricity.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.