Which of the following weathering processes results in the reddish orange coating metal (rust)? select one: a. differential weathering b. freeze thaw c. root wedging d. oxidation which of the following features is formed by the collapse of caves? select one: a. stalagmite b. travertine c. flowstone d. sinkhole e. stalactite the largest area of karst in the united states is included in: select one: a. north dakota b. north carolina c. florida d. texas

1 ) D. oxidation processes results in the reddish orange coating metal (rust).

2 ) D. sinkhole  is formed by the collapse of caves .

3 ) The largest area of karst in the United States is included in C. Florida

Explanation:

1 ) Oxidation -

Oxidation is the process that causes the metal to rust  , in presence of moist air . This weathering process is also useful in the cave formation

2) Sinkhole -

Sinkhole is a hole in the ground which is formed when both rocks and soil are removed by flowing water .

3) Florida -

Florida includes the largest area of karst in the United States .