Step 1: Recall what Cover and Plinth means.
Cover and Plinth, usually abbreviated CAP, is a method where food grain bags are stacked on a raised, damp proof plinth and then covered with waterproof sheets, used mainly when covered warehouse space is not available.
Step 2: Identify its purpose.
The entire arrangement, raised plinth plus weatherproof cover, exists purely to protect stacked grain bags from ground moisture, rain and pests during outdoor storage, it is not a drying, blanching or condensation process at all.
Step 3: Match to the correct category.
Since its function is to hold and protect grain until it is used or moved, CAP is a storage method.
\[ \boxed{Storage} \]