Some central american countries have a strain put on their water resources by visting blank who use the water.

a) storms

b) cars

c) tourists

Which of the following is not a place where hydrogen can be found on earth? a. natural gas well b. atmosphere c. water d. mine

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

Which domain endings indicate websites that are most likely to be reliable sources? check all that apply. sites ending in .net