<h3><em>These children [to be sacrificed to the mountain and other gods] would be collected from all over the land and would be carried in litters together … They should be very well dressed, paired up female and male.</em></h3><h2><em><u>Juan de Betanzos, 1551</u></em></h2><h3><em>Human nature would not allow them to kill their own children … if they did not expect some reward for what they were doing or if they did not believe that they were sending their children to a better place.</em></h3>
"Toward the end of the first year, infants use patterns of rising and falling intonation that resemble the sounds of adult speech."
<em>Intonation</em> is the way the pitch of the voice goes up and down as you speak.
Reproducing adult intonations is one of the ways young children pick up the speech patterns in the language which is spoken at home, even before they know how to formulate sentences. It is the result of the imprint of their parents' speech on their memory. Therefore, when the child then prattles using this intonation, it may sound like they are babbling in their parents' language.
Out of Africa theory
This theory is supported by modern research that early primate life begun in Africa and later spread to other parts of the world. several prehistoric sites have been unearthed in the East African region which supports these assertions.
Is there more to this question if not I can figure it out
The answer is part time work
