What is the term that developmentalists use to describe the oo-ing, ah-ing, and gurgling sounds that infants produce when they are 2 months old?

The answer is cooing.

Cooing refers to the phenomenon where young infants make vowel like sounds such as "h" and "h" or gurgling sounds. Cooing is part of an infant's pre-linguistic development. Infants make cooing sounds to discover and test out their ability to vocalize. 

They wanted to make slaves out of them.they wanted force them to move off their landthey wanted to make them grow crops for very little pay.they refused to speak native american languages