Which of these surface features are formed because of the chemical actions of groundwater?

wells and waterfalls

sinkholes and caves

hot springs and geysers

wetlands and volcanoes

Question

Which of these surface features are formed because of the chemical actions of groundwater? 

 wells and waterfalls 

 sinkholes and caves 

 hot springs and geysers 

 wetlands and volcanoes

anonymous · Answer

@Marrioncito the last one man can you help me?

anonymous · Answer

I really dont know but...volcanoes? Impossible...Geysers I don´t think it is related to chemical properties. Waterfalls?  
Sinkholes and caves maybe...

anonymous · Answer

Oh yes, it´s right;    WIki says; A sinkhole, also known as a sink, snake hole, swallow hole, swallet, doline, or cenote, is a natural depression or hole in the Earth's surface caused by karst processes — the chemical dissolution of carbonate rocks[1] or suffosion processes[2] for example in sandstone.

anonymous · Answer

thanks :)

anonymous · Answer

You are welcome!! The next time you should have to exclude 2 of 4 ok? :P Really, some of them are hilarous options :P

mayataylor · Answer

What was the answer @jorge3o5 @marrioncito