Which of the following substances are used primarily to generate energy, like gasoline and electricity? a. minerals b. ores c. fossil fuels d. precious gems

Which objects allow humans to access groundwater? check all that apply.

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.

Which of the following scenarios is an example of a trade sanction