Pre - linguistic stages of language development include :

Correct option is D

Cooing and Babbling
Pre-linguistic stages of language development include cooing and babbling. These are the stages before a child begins to form recognizable words. Cooing usually occurs at around 2 months of age and consists of the baby making soft, vowel-like sounds. Babbling starts at around 4-6 months and includes consonant sounds in addition to vowels. It's a form of vocal experimentation as babies begin to explore their vocal tract and start to produce sounds resembling the language spoken around them. These stages are crucial as they lay the foundation for later speech and language development.