The answer is the critical period. Destructive substances, for example, medications or radiation that attack the womb and result in birth abandons are called teratogens. Teratogens are particularly harming in the embryonic stage since it is a critical period in pre-birth advancement.
Answer:
The correct answer is D. 12 months; sounds are related to meaning.
Explanation:
The linguistic stage is a stage of language development that goes after the pre-linguistic language development in which the infants are able to produce vegetative sounds, cooing and laughter and vocal play but have no real understanding of the meaning of the sounds they are producing, this stage ends when the infant begin to understand the relation between communication and the sounds he or she is making, and this is when the Linguistic stage enters, usually at 12 months or so.