A.I. Explanation:

Correct answer: colonization

Explanation: The term 'colonization' refers to the act of establishing control over a foreign territory, which fits the context of the first humans arriving in the New World. It aligns grammatically as a noun that describes the process of settlement and exploration.

Meaning: 'Colonization' is the process of settling among and establishing control over the indigenous people of an area.

Wrong options:

• controlled: 'Controlled' is a verb that implies managing or directing something, which does not fit grammatically as a noun in this context.
• cultivated: 'Cultivated' is a past participle that refers to the act of growing crops, which does not relate to the arrival of humans in the New World.
• paucity: 'Paucity' is a noun that means scarcity, which does not fit the context of describing the arrival of humans.
• vanquish: 'Vanquish' is a verb meaning to defeat thoroughly, which does not relate to the context of human arrival and is grammatically incorrect here.
• variation: 'Variation' is a noun that refers to a change or difference, which does not fit the context of the settlement process.

Correct answer: paucity

Explanation: The word 'paucity' indicates a scarcity or lack of something, which is appropriate in this context as it describes the limited number of domesticable species available to the hunter-gatherers. It fits grammatically as a noun that describes the situation they faced.

Meaning: 'Paucity' means a small or insufficient quantity of something.

Wrong options:

• colonization: 'Colonization' refers to the act of settling and does not relate to the scarcity of species in this context.
• controlled: 'Controlled' is a verb that does not fit grammatically as it does not describe a lack of species.
• cultivated: 'Cultivated' is a past participle that refers to the act of growing plants, which does not describe scarcity.
• vanquish: 'Vanquish' is a verb meaning to defeat, which is unrelated to the concept of scarcity.
• variation: 'Variation' refers to a change or difference, which does not convey the idea of scarcity.

Correct answer: cultivated

Explanation: The term 'cultivated' is a past participle that describes the action of growing crops, which fits the context of agriculture arriving from Mexico. It aligns grammatically as it describes what was done to the crops.

Meaning: 'Cultivated' means to prepare and use land for crops or gardening.

Wrong options:

• colonization: 'Colonization' refers to the act of settling and does not fit the context of growing crops.
• controlled: 'Controlled' is a verb that implies management, which does not fit the context of agricultural practices.
• paucity: 'Paucity' refers to scarcity and does not relate to the action of growing crops.
• vanquish: 'Vanquish' is a verb meaning to defeat, which is unrelated to the cultivation of crops.
• variation: 'Variation' refers to a change or difference, which does not describe the action of growing crops.