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.

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