Meaning: 'Downturn' means a decline or decrease in economic activity, often leading to financial difficulties.

Wrong options:

• inturn: 'Inturn' is not a recognized English word and does not fit the context or grammatical structure of the sentence.
• external: 'External' refers to something outside or outer, which does not relate to the financial pressures being discussed in this context.
• subjective: 'Subjective' pertains to personal opinions or feelings, which does not apply to the objective economic situation described.

Correct answer: popular

Explanation: The word 'popular' is an adjective that describes something widely liked or appreciated, fitting well in the context of a reference book that is sought after by families. It aligns with the grammatical structure and conveys the intended meaning effectively.

Meaning: 'Popular' means well-liked or favored by many people, indicating that the Good Schools Guide is a trusted resource for families.

Wrong options:

• nicee: 'Nicee' is a misspelling of 'nice' and does not convey the intended meaning of being widely accepted or favored.
• kind: 'Kind' describes a quality of being friendly or generous, which does not accurately describe a reference book's status or reception.
• allure: 'Allure' refers to the quality of being attractive or fascinating, but it does not fit grammatically as an adjective describing the book.

Correct answer: Explaining

Explanation: The verb 'Explaining' fits grammatically as it indicates the action of providing reasons or clarifications, which is appropriate in the context of discussing the guide's increased number of schools. It aligns with the sentence structure and conveys the intended meaning clearly.

Meaning: 'Explaining' means to make something clear or easy to understand, particularly in the context of providing information about the guide's changes.

Wrong options:

• Entertaining: 'Entertaining' means providing amusement or enjoyment, which does not relate to the context of providing information about the guide.
• Exploring: 'Exploring' implies investigating or examining, which does not fit the context of clarifying or providing reasons for the increase in schools.
• Exorting: 'Exorting' is a misspelling of 'exhorting,' which means to strongly encourage or urge someone to do something, not fitting the context of explaining.

Correct answer: sector

Explanation: The word 'sector' is a noun that refers to a distinct part or division of a larger system, which fits perfectly in the context of discussing state schools. It aligns grammatically and contextually with the sentence's focus on education.

Meaning: 'Sector' refers to a specific area or division within a larger context, in this case, the educational system.

Wrong options:

• factor: 'Factor' refers to an element that contributes to a result, which does not fit the context of discussing schools as a division of education.
• vector: 'Vector' is a mathematical term or can refer to a direction, which is unrelated to the context of education and schools.
• collector: 'Collector' refers to a person or thing that collects, which does not relate to the discussion of educational institutions.