Correct option is D
The incorrect part is (D).
Detailed Analysis
- The Error: "...over an environmental Treaty."
- The Rule: This is a prepositional error. When referring to something established or governed by a formal legal agreement or treaty, the correct preposition is "under."
- Under: Used to indicate being subject to the authority, rules, or conditions of a document (e.g., under the law, under the contract, under the treaty).
- The Correction: Change "over" to "under."
- Corrected Sentence: A Ramsar site is a wetland designated to be of international importance under an environmental Treaty.
Breakdown of Other Parts
- (A) A Ramsar site is a: Correct. "A" matches the singular "Ramsar site."
- (B) wetland designated to: Correct. "Designated" is the past participle used to describe the wetland, and "to" begins the infinitive of purpose.
- (C) be of international importance: Correct. "Of [noun] importance" is a standard idiomatic construction.
Grammar Guide: Prepositions for Legal Contexts
Choosing the right preposition for formal documents and agreements is essential for idiomatic accuracy.
| Preposition | Usage | Example |
| Under | Subject to a treaty, law, or contract. | Rights guaranteed under the Constitution. |
| By | The means through which it was done. | Designated by the committee. |
| In | Located within the text of a document. | As mentioned in the treaty. |
| Over | Higher rank or physical position. | He has authority over the staff. |