What is the difference in underlying strata that forms a limestone cave vs a limestone area forming a sink hole?

i need a reference for each question

Class:  What is the weathering process in cap rocks? paragraph

Class:  There is also something called root wedging  ( a biological type of erosion)  What is this? paragraph

Where are you likely to see temperature changes to cause exfoliation? paragraph

Class:  Lets look into something called ocean acidification. What is this and how is it different than acid rain?   What ecosystems are considered fragile if there are changes in pH? paragraph

What is the difference in underlying strata that forms a limestone cave vs a limestone area forming a sink hole? paragraph