A.I. Explanation:

Correct answer: summit

Explanation: The word 'summit' refers to the highest point of a mountain, which is the context of the sentence discussing Mount El’brus. It fits grammatically as a noun that completes the phrase 'Reaching the __BLANK 1__ of El’brus.'

Meaning: 'Summit' means the highest point of a mountain or hill.

Wrong options:

• destination: The term 'destination' refers to a place to which someone is going, which does not specifically indicate the highest point of the mountain.
• attempted: 'Attempted' is a verb that does not fit as a noun in this context, as it does not refer to a physical location.
• enclosure: 'Enclosure' refers to an area that is sealed off or fenced, which is unrelated to the concept of a mountain's peak.
• elevation: While 'elevation' relates to height, it does not specifically denote the peak itself, making it less precise than 'summit.'
• succeeded: 'Succeeded' is a verb that indicates achieving a goal, which does not fit the context of describing a physical location.

Correct answer: attempted

Explanation: The word 'attempted' is a verb that indicates the action of trying to do something. It fits grammatically as it follows 'should only be,' which requires a past participle to complete the passive construction.

Meaning: 'Attempted' means to try to do something, especially something difficult.

Wrong options:

• summit: 'Summit' is a noun and does not fit grammatically as it cannot follow 'should only be' in this context.
• destination: 'Destination' is a noun that does not convey the action of trying and therefore does not fit the grammatical structure.
• enclosure: 'Enclosure' is a noun that does not relate to the action of trying to reach a goal, making it inappropriate here.
• elevation: 'Elevation' is a noun that does not fit the verb form required in this context.
• succeeded: 'Succeeded' is a verb that indicates achieving a goal, which does not fit the context of attempting something.

Correct answer: elevation

Explanation: The term 'elevation' refers to the height of a location above a reference point, typically sea level. It fits grammatically as a noun that completes the phrase 'up to an __BLANK 3__ of 3,658 meters.'

Meaning: 'Elevation' means the height of a place above sea level.

Wrong options:

• summit: While 'summit' refers to the highest point, it does not fit the context of describing a height that climbers can reach, which is indicated by 'up to an __BLANK 3__.'
• destination: 'Destination' refers to a place someone is going, which does not relate to the height or measurement of a mountain.
• attempted: 'Attempted' is a verb and does not fit as a noun in this context, as it does not describe a measurement of height.
• enclosure: 'Enclosure' refers to a confined area, which is unrelated to the concept of height or elevation.
• succeeded: 'Succeeded' is a verb that indicates achieving a goal, which does not fit the context of describing a height.