Step 1: Understanding the Concept:
A post-harvest system consists of a structured sequence of physical, technical, and economic activities that occur from the moment of crop harvest until the product reaches the final consumer.
Post-harvest losses are categorized into quantitative losses (reduction in physical mass) and qualitative losses (reduction in nutrient value, viability, or consumer acceptability).
Step 2: Detailed Explanation:
Let us analyze each pair:
1. Harvesting of farm produce (A): Harvesting is the initial physical operation of gathering the crop from the field.
It is a primary technical activity of the post-harvest system that requires specific tools, labor, and timing to minimize initial damage.
Thus, (A) matches with (III).
2. Marketing of farm produce (B): Marketing involves buying, selling, pricing, and distributing the harvested produce to various retail channels.
This constitutes the primary economic activity of the post-harvest chain, linking the producer to the consumer.
Thus, (B) matches with (IV).
3. Loss of physical substance (C): A reduction in the actual weight or volume of the commodity (e.g., due to insect feeding, spillage, or decay) represents a direct quantitative loss.
Thus, (C) matches with (I).
4. Loss of seed viability (D): When seeds lose their germinability due to poor storage conditions, the physical mass may remain unchanged, but the value and functional properties are degraded.
This represents a qualitative loss.
Thus, (D) matches with (II).
Step 3: Final Answer:
The correct matching sequence is (A)-(III), (B)-(IV), (C)-(I), and (D)-(II), which corresponds to option (A).