Vertebrate span across a diverse array of life on earth today. fish are the first to evolve and amphibians still live with strong ties to bodies of water which is evident in their life circle

To kill bacteria from our body especially from stomach

The right answer is c.sandstone.

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution