Identify the correct statements with reference to weathering:
A. Chemical weathering is common in desert areas due to large diurnal variations of temperature.
B. Mechanical weathering occurs in cold regions by means of frost action.
C. One form of mechanical weathering by plants called chelating.
D. Limestone is every resistant to wind action but it is highly susceptible to rain water.
Choose the correct answer from the option given below:

Correct option is A

 Mechanical weathering occurs in cold regions by means of frost action. This statement is correct. Mechanical weathering occurs in cold regions primarily due to frost action, where water enters cracks, freezes, and expands, causing the rock to break apart.
Limestone is every resistant to wind action but it is highly susceptible to rain water. This statement is correct. Limestone is indeed highly resistant to wind action but very susceptible to chemical weathering by rainwater, as it dissolves easily in weak acids, particularly carbonic acid formed when rainwater absorbs atmospheric CO₂.
Information Booster:
· Mechanical weathering is dominant in cold climates where frost wedging is a key process.
· Chemical weathering is more common in humid regions, where rainfall and temperature facilitate reactions.
· Frost action is a significant cause of rock fragmentation in polar and alpine regions.
· Limestone is prone to chemical weathering due to its calcium carbonate content, which reacts with weak acids in rainwater.
· Wind erosion is less effective on dense materials like limestone but can affect more fragile rock types.
Additional Knowledge:
Chemical weathering is common in desert areas due to large diurnal variations of temperature. This statement is incorrect. Chemical weathering is not dominant in desert areas; instead, mechanical weathering like thermal expansion is common due to temperature fluctuations.
One form of mechanical weathering by plants called chelating.This statement  is incorrect. Chelating is a form of chemical weathering, not mechanical weathering. It involves organic acids produced by plants breaking down minerals.