According to one major language theory, how did different groups develop their own languages? by trading tools and goods with other communities by developing words for tools that were unique within their communities by coming up with their own language systems by conquering groups they met and bringing them along as slaves

The correct answer is B) by developing words for tools that were unique within their communities.

According to one major language theory, different groups developed their own languages by developing words for tools that were unique within their communities.

Scientists do not agree on a single source as the origin of human language. However, some scientists agree on the idea that aa group of nomads that wandered Western Asia and Eastern Europe in 3000 BC, could be the ones who formed a series of sounds that represented a primitive first form of language. That language represented the foundation of the Indo-European language.

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."