It is a type of babbling in which infants repeat a syllable, such as "ba-ba-ba" or "ma-ma-ma".

It refers to the language that a child is exposed to in their environment. This includes the language spoken by their caregivers, as well as any other language input they receive through media, social interactions, or other sources. It is crucial for language acquisition as children use it to build their linguistic knowledge and skills.

It is a theoretical perspective in language acquisition that emphasizes the complex interplay between innate linguistic knowledge and experience in shaping language development.

It refers to a child's use of a word to refer to a wider range of objects or concepts than is appropriate, such as calling all four-legged animals "doggie."

It is a theoretical perspective in language acquisition that suggests that humans are born with an innate knowledge of the language, including a set of linguistic principles and rules that are universal across all languages.

It is a concept in linguistics that suggests that there is a set of innate linguistic principles and rules that underlie all human languages, and that children are born with the ability to acquire these principles and rules.

It refers to the modified language input that adults use when speaking to young children, which typically includes simplified sentence structures, exaggerated intonation patterns, and a higher pitch.

It is the understanding that objects continue to exist even when they are not visible or present in the immediate environment, which is considered to be an important cognitive milestone in early development.

It is an individual's ability to reflect on and manipulate language as an object of thought, which typically emerges in later stages of language development.

It refers to the negative impact of the first language on the acquisition or use of a second language.

It is the application of knowledge or skills from one context to another, such as the transfer of language skills from the first language to a second language.

They are fixed or semi-fixed phrases that are used frequently in language, such as "how are you?" or "thank you," and are often learned and used as a single unit rather than as individual words.

It refers to the idea that single words appear to substitute for the meaning or thought conveyed in a full complete sentence.