About half the world's population speaks a language that belongs to what language family? 1.balto-slavic, 2.indo-european, 3.greek, 4.celtic.

2, Indo -European

Explanation:

The Indo-European languages are spoken by about 3,5 billion people in the world, which is half of the world's population.

The Indo-European languages are spoken most in Europe and in areas of European settlements, they are also present in South Asia.

There are around 10 branches of the Indo-European language family: Anatolian, Indio Iranian, Greek, Italic, Germanic, Armenian, Tocharian, Celtic, Balto-Slavic and Albanian.

All the languages share a number of items of basic vocabulary as well as some common grammatical structures,

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explanation:

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