Explanation: Exfoliation is a physical weathering process of unloading, thermal contraction and expansion and salt weathering. Exfoliation is a result but not a process.

• Flaking off of more or less curved sheets of shells from over rocks or bedrock results in smooth and rounded surfaces.
• Exfoliation can occur due to expansion and contraction induced by temperature changes.
• Exfoliation domes and tors result due to unloading and thermal expansion respectively.

Source: NCERT – Fundamental of Physical Geography