Meaning: Emotion refers to strong feelings such as joy, anger, or sadness, which are often depicted in art.

Wrong options:

• adulthood: Adulthood is a noun that refers to the stage of life after adolescence, which does not fit in the context of describing the nature of his works.
• and: And is a conjunction used to connect words or phrases, which does not fit as it does not describe a quality of the artwork.
• but: But is a conjunction used to introduce a contrast, which does not fit as it does not describe a quality of the artwork.
• focus: Focus is a noun that refers to the center of interest or activity, which does not accurately describe the emotional aspect of his works.
• known: Known is an adjective that describes something recognized or familiar, which does not fit as it does not describe a quality of the artwork.
• retirement: Retirement is a noun that refers to the period of life after leaving one's job, which does not relate to the emotional quality of his art.

Correct answer: but

Explanation: The word 'but' serves as a conjunction that introduces a contrast between van Gogh's lack of recognition during his lifetime and the veneration he received posthumously. This maintains the logical flow of the sentence.

Meaning: But is used to indicate a contrast or exception, linking two contrasting ideas.

Wrong options:

• adulthood: Adulthood is a noun that does not function as a conjunction and does not fit in this context.
• and: And is a conjunction that adds information rather than contrasting it, which does not fit the intended meaning here.
• emotion: Emotion is a noun that does not serve as a conjunction and does not fit in this context.
• focus: Focus is a noun that does not function as a conjunction and does not fit in this context.
• known: Known is an adjective that does not serve as a conjunction and does not fit in this context.
• retirement: Retirement is a noun that does not function as a conjunction and does not fit in this context.

Correct answer: adulthood

Explanation: The term 'adulthood' is a noun that refers to the stage of life when one is fully grown and developed. It fits grammatically and contextually as it describes the period in which van Gogh was apprenticed.

Meaning: Adulthood refers to the stage of life after childhood and adolescence, typically characterized by maturity and independence.

Wrong options:

• but: But is a conjunction that introduces contrast and does not fit as it does not describe a stage of life.
• emotion: Emotion is a noun that does not relate to a stage of life and does not fit in this context.
• focus: Focus is a noun that refers to concentration or attention, which does not describe a life stage.
• known: Known is an adjective that does not describe a life stage and does not fit in this context.
• retirement: Retirement refers to the period after one stops working, which is not applicable to the early life stage being described.

Correct answer: devote

Explanation: The word 'devote' is a verb that means to dedicate time and effort to a particular activity. It fits grammatically as it describes van Gogh's decision to commit himself to art.

Meaning: Devote means to give all or a large part of one's time or resources to a person, activity, or cause.

Wrong options:

• adulthood: Adulthood is a noun that does not fit as it does not describe an action or decision.
• but: But is a conjunction that does not function as a verb and does not fit in this context.
• emotion: Emotion is a noun that does not describe an action and does not fit in this context.
• focus: Focus is a noun that does not describe an action and does not fit in this context.
• known: Known is an adjective that does not describe an action and does not fit in this context.
• retirement: Retirement is a noun that does not describe an action and does not fit in this context.

Correct answer: known

Explanation: The word 'known' is an adjective that describes something that is recognized or familiar. It fits grammatically as it describes the works created by van Gogh, indicating their recognition.

Meaning: Known refers to something that is recognized or acknowledged, particularly in terms of reputation.

Wrong options:

• adulthood: Adulthood is a noun that does not fit as it does not describe the status of the works.
• but: But is a conjunction that does not function as an adjective and does not fit in this context.
• emotion: Emotion is a noun that does not describe the status of the works and does not fit in this context.
• focus: Focus is a noun that does not describe the status of the works and does not fit in this context.
• retirement: Retirement is a noun that does not describe the status of the works and does not fit in this context.