Meaning: 'Accomplishment' refers to something that has been achieved successfully.

Wrong options:

• working: 'Working' is a gerund that does not fit the context of feeling a sense of achievement.
• security: 'Security' is a noun that refers to safety, which does not convey the feeling of achievement in this context.
• peaceful: 'Peaceful' is an adjective that describes a state of calmness, not an achievement.
• incredibly: 'Incredibly' is an adverb that modifies verbs or adjectives, not suitable as a noun here.
• become: 'Become' is a verb that does not fit grammatically as it does not express a feeling or state.
• breaking: 'Breaking' is a gerund that does not relate to the sense of achievement being described.
• cultural: 'Cultural' is an adjective that does not fit as it does not describe a feeling of achievement.

Correct answer: security

Explanation: The term 'security' is a noun that refers to the feeling of safety and protection. It fits contextually as the author contrasts this feeling with the experience of traveling alone.

Meaning: 'Security' refers to the state of being free from danger or threat.

Wrong options:

• working: 'Working' is a gerund that does not relate to feelings of safety or protection.
• accomplishment: 'Accomplishment' refers to achievement, which does not fit the context of safety.
• peaceful: 'Peaceful' is an adjective that describes calmness, not a state of safety.
• incredibly: 'Incredibly' is an adverb that does not fit as it does not describe a noun related to safety.
• become: 'Become' is a verb that does not relate to the concept of security.
• breaking: 'Breaking' is a gerund that does not convey the idea of safety.
• cultural: 'Cultural' is an adjective that does not fit in the context of safety or protection.

Correct answer: cultural

Explanation: The word 'cultural' is an adjective that describes the scene the author is adjusting to. It fits grammatically and contextually as it relates to the new experiences in a different cultural setting.

Meaning: 'Cultural' pertains to the ideas, customs, and social behavior of a particular people or society.

Wrong options:

• working: 'Working' is a gerund that does not describe a scene or setting.
• security: 'Security' is a noun that does not fit as it does not describe the nature of the scene.
• peaceful: 'Peaceful' is an adjective that describes calmness but does not relate to the cultural aspect of the scene.
• incredibly: 'Incredibly' is an adverb that does not fit as it does not describe a noun.
• become: 'Become' is a verb that does not fit grammatically in this context.
• breaking: 'Breaking' is a gerund that does not relate to the description of a scene.
• accomplishment: 'Accomplishment' is a noun that does not describe the nature of the scene.

Correct answer: incredibly

Explanation: The adverb 'incredibly' modifies the adjective 'welcoming,' enhancing the description of the Cambodian people's friendliness. It fits grammatically and contextually to emphasize the warmth of the locals.

Meaning: 'Incredibly' means to an extreme degree; it emphasizes the extent of the welcoming nature.

Wrong options:

• working: 'Working' is a gerund that does not fit as it does not modify an adjective.
• security: 'Security' is a noun that does not fit in the context of describing the welcoming nature of people.
• peaceful: 'Peaceful' is an adjective that does not fit as it does not modify the welcoming nature.
• accomplishment: 'Accomplishment' is a noun that does not serve as a modifier in this context.
• become: 'Become' is a verb that does not fit grammatically as it does not modify an adjective.
• breaking: 'Breaking' is a gerund that does not relate to the description of the people.
• cultural: 'Cultural' is an adjective that does not fit as it does not modify the welcoming nature.

Correct answer: peaceful

Explanation: The adjective 'peaceful' describes the oasis, fitting grammatically and contextually as it conveys a sense of calm and tranquility that the author experienced during their stay.

Meaning: 'Peaceful' means free from disturbance; tranquil.

Wrong options:

• working: 'Working' is a gerund that does not describe a state of being for a place.
• security: 'Security' is a noun that does not fit as it does not describe the nature of the oasis.
• accomplishment: 'Accomplishment' is a noun that does not fit as it does not describe a place.
• incredibly: 'Incredibly' is an adverb that does not fit as it does not describe a noun.
• become: 'Become' is a verb that does not fit grammatically in this context.
• breaking: 'Breaking' is a gerund that does not relate to the description of the oasis.
• cultural: 'Cultural' is an adjective that does not fit as it does not describe the nature of the oasis.