Baby Todd’s mother notices that he makes a variety of sounds including cooing, crying, gurgling, and murmuring, along with facial expressions, gestures, imitation, and other nonlinguistic means. Baby Todd is demonstrating .

prelinguistic communication

Explanation:

The prelinguistic stage is defined as the phase between birth and when a child makes conscious use of words or signs. They interact with gestures, vocalizations, facial expressions, and body language even before they learn words. It's a time when children improve their ability to communicate with others, first use eye contact, presence, and social-emotional impact, and then incorporate other nonverbal means to communicate.

one way archaeology us understand the past is through the material objects it finds, allowing us to know what was being used, and when. for example a dig recently found a flute, believed to be the oldest musical instrument found to date.

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