For this question, choose the option opposite in meaning to the word or phrase in italics. The natives were allowed to stay.

Natives means people who were born in or originally belong to a particular place. They are the indigenous or original inhabitants of a region.

The word opposite in meaning is foreigners, which means people who come from or belong to another country or place. While natives are people of the land, foreigners are people from elsewhere - a direct contrast.

The other options are not the best antonyms:

• immigrants are people who come to live permanently in a foreign country. While immigrants are not natives, the word specifically refers to permanent relocation, making it narrower than foreigners.
• indigenes means the same thing as natives - original inhabitants. It is a synonym, not an antonym.
• visitors are people who come to a place temporarily. While visitors are not natives, the word focuses on the temporary nature of a stay rather than foreign origin.

Foreigners is the most direct and general antonym of natives because it simply means people who belong to another place.