What are source of freshwater? explain how water is a renewable resources

Fresh water mean No salt. no water poulation. it is about pure water.renewable resources we are perceive perceive surrounded . that means clean water.

Water is renewable because of filtration systems that allow the water to become salt free and pollution free. Most freshwater lakes have running creeks or rivers which allows more filtration because moving water is cleaner then still water.

Ithink the answer is b

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.