Chapter I introduction background

CHAPTER II
DISCUSSION

1. 
   Language Acquisition.
   

Language acquisition is the process by which humans acquire the capacity to perceive and comprehend language, as well as to produce and use words and sentences to communicate. Language acquisition is one of the quintessential human traits, because nonhumans do not communicate by using language. Language acquisition usually refers to first-language acquisition, which studies infants' acquisition of their native language and second language acquisition which deals with the acquisition (in both children and adults) of additional languages.

1. 
   First and Second Language Acquisition.
   

First-language acquisition is a universal process regardless of home language or native language. A first language is the language a person has learned from birth or within the critical period, or that a person speaks the best and so is often the basis for sociolinguistic identity. In some countries, the terms native language or mother tongue refer to the language of one's ethnic group rather than one's first language. The examples from first language acquisition are such as the babies listen to the sounds around them, begin to imitate them, and eventually start producing words (in their country language). In first language acquisition, native speakers are considered to be an authority on their given language due to their natural acquisition process regarding the language, versus having learned the language later in life. This is achieved through personal interaction with the language and speakers of the language. Native speakers will not necessarily be knowledgeable about every grammatical rule of the language, but will have good "intuition" of the rules through their experience with the language.
Second language acquisition assumes knowledge in a first language and encompasses the process an individual goes through as he or she learns the elements of a new language, such as vocabulary, phonological components, grammatical structures, and writing systems. In other resources written that Second-language acquisition is the process by which people learn a second language. Second language refers to any language learned in addition to a person's first language. Second-language acquisition refers to what learners do; it does not refer to practices in language teaching.

2.