Goddammit...I hate this on 2021 this year whole school has started giving us MCQ questions and I'm hella scared :(

id. k how to prepare for that​

After rain, water soaks into the ground and is added to the groundwater. this process is known as a. groundwater pollution. b. groundwater recharge. c. groundwater recycling. d. groundwater filtration.

Certification programs are offered by all of the following except

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide