A.I. Explanation:

Correct answer: stretches

Explanation: The word 'stretches' fits grammatically as it is a plural noun that aligns with 'one of the longer,' indicating a length of coastline. Contextually, it conveys the idea of extending over a distance, which is appropriate for describing a coastline.

Meaning: 'Stretches' refers to areas that extend over a certain distance, often used to describe long, continuous lengths of land or water.

Wrong options:

• spreads: 'Spreads' implies a distribution over an area, which does not convey the idea of length as effectively in this context.
• extensions: While 'extensions' can refer to lengths, it is more commonly used in contexts of adding to something rather than describing a length of coastline.
• spans: 'Spans' suggests covering a distance but is less commonly used to describe coastlines compared to 'stretches,' making it less fitting here.

Correct answer: shortage

Explanation: The term 'shortage' fits grammatically as a noun that describes a lack of something, which is appropriate in the context of visitors. It aligns with the sentiment of the sentence, indicating that there are not enough visitors.

Meaning: 'Shortage' means a situation where there is not enough of something, in this case, visitors to the coastline.

Wrong options:

• insufficiency: 'Insufficiency' is a more formal term and does not fit the tone of the passage as well as 'shortage.'
• shortfall: 'Shortfall' implies a deficit but is less commonly used in this context compared to 'shortage.'
• deficiency: 'Deficiency' suggests a lack of an essential quality, which does not directly convey the idea of visitor numbers as effectively as 'shortage.'

Correct answer: merit

Explanation: The word 'merit' fits grammatically as a verb that indicates deserving attention or recognition. Contextually, it suggests that the beaches are worthy of mention, aligning with the overall positive tone of the passage.

Meaning: 'Merit' means to deserve or be worthy of something, in this case, particular mention for the beaches.

Wrong options:

• worth: 'Worth' is an adjective and does not fit grammatically as a verb in this context.
• entitle: 'Entitle' implies giving a right to something, which does not convey the intended meaning of deserving mention.
• claim: 'Claim' suggests asserting a right to something, which does not fit the context of deserving recognition.

Correct answer: belt

Explanation: The word 'belt' fits grammatically as a noun that describes a continuous area or strip. Contextually, it effectively conveys the idea of a region of dunes, which aligns with the description of the landscape.

Meaning: 'Belt' refers to a continuous area or strip of land, in this case, the striking dunes.

Wrong options:

• strand: 'Strand' typically refers to a shore or beach, which does not fit the context of describing a region of dunes as effectively as 'belt.'
• portion: 'Portion' implies a part of a whole but lacks the geographical connotation that 'belt' provides in this context.
• strap: 'Strap' is not commonly used to describe land features and does not fit the context of dunes.

Correct answer: northerly

Explanation: The word 'northerly' fits grammatically as an adjective describing the direction of the National Parks. Contextually, it indicates the geographical position of Northumberland, aligning with the overall description of the area.

Meaning: 'Northerly' means situated towards the north, indicating the location of the National Parks in relation to other areas.

Wrong options:

• northward: 'Northward' is an adverb and does not fit grammatically as an adjective in this context.
• northbound: 'Northbound' typically describes movement towards the north, which does not fit the static description of a location.
• northernmost: 'Northernmost' implies the furthest point north, which is too absolute for the context of describing a park's general location.

Correct answer: defined

Explanation: The word 'defined' fits grammatically as a past participle used as an adjective, indicating the boundary of the southern border. Contextually, it conveys the idea of being clearly marked or established, which is appropriate for describing Hadrian’s Wall.

Meaning: 'Defined' means clearly marked or established, indicating the boundary set by Hadrian’s Wall.

Wrong options:

• outlined: 'Outlined' suggests a sketch or general description, which does not convey the same sense of a clear boundary as 'defined.'
• limited: 'Limited' implies restrictions, which does not fit the context of describing a geographical boundary.
• lined: 'Lined' suggests being bordered or having a line, which is less precise than 'defined' in this context.