Step 1: Understanding the Question:
This question tests knowledge of weathering processes.
Step 2: Detailed Explanation:
Solution (A) is the process of dissolution of minerals by water.
It is a chemical weathering process where minerals dissolve in water.
Examples: Dissolution of calcite (CaCO$_3$) and gypsum (CaSO$_4$).
Other processes:
- Hydration (B): Addition of water to minerals.
- Hydrolysis (C): Reaction of minerals with water (chemical breakdown).
- Oxidation (D): Reaction with oxygen.
Thus, solution is the dissolution of minerals by water.
Step 3: Final Answer:
Thus, the process of dissolution of minerals by water is solution, which corresponds to option (A).
[0.5cm]