Annie is studying four surface features of Florida. She classifies the surface features and places them in different columns of a chart as shown below.

Surface Features
Column 1 Column 2
Sinkholes Hot springs
Caverns Geysers

On what basis did Annie most likely classify the surface features?
their average age
their average size
processes responsible for their formation
events leading to their destruction

Question

Annie is studying four surface features of Florida. She classifies the surface features and places them in different columns of a chart as shown below.

Surface Features
Column 1	Column 2
Sinkholes	Hot springs
Caverns	Geysers

On what basis did Annie most likely classify the surface features?
 their average age
 their average size
 processes responsible for their formation
 events leading to their destruction