Will mark ! which of the following natural factors is likely to support the formation of a sinkhole? unpolluted air limestone bedrock lack of underground water impervious non-reactive rock

A limestone bedrock is the most likely natural factor that may support the formation of a sinkhole.

Explanation:

Sinkholes are usually formed when for a prolonged period, water or other erosive substance percolates or seeps through a soluble rock and gradually erodes it in a deep cavity-like formation. This cavity undergoes erosion and the walls of the cavity keep weathering to form a sinkhole. Impervious non-reactive rocks do not favor the formation of a sinkhole.