Concept:The word "fetid" means having a very unpleasant, foul smell.
Therefore, the term most opposite to it should express a clean, sweet, or pleasant smell.
Explanation:The underlined word "fetid" is used to describe a refuse dump that gives off a rotten and offensive odour.
The sentence then introduces an orchard, a place where fruits grow and the air usually carries a mild, fresh scent.
For the gap to be filled correctly, the chosen word must not only be opposite in meaning to "fetid" but also logically fit the positive atmosphere of an orchard.
"Fragrant" means having a sweet or pleasing aroma, so it is exactly the opposite of "fetid".
"Spicy", "clean", and "dry" do not directly contrast with "fetid" or describe an orchard's smell effectively.
Hence, "fragrant" is the most suitable choice.
Answer:A. fragrant