Language skills are necessary for effective communication in any environment and to interact with others. It allows an individual to comprehend and produce language for proper and effective interpersonal communication.The four basic language skills and their natural order are listening-speaking-reading-writing. These foundational skills of language are divided into two categories which are receptive and productive skills.?The receptive skills of language are listening and reading because these skills don't require the production of language. These skills focus on an individual's ability of understanding and comprehending language.The input (receptive skills) a child hears in each language may affect vocabulary size as children learn what they hear the most as first we listen in order to assimilate information or to access messages through the spoken word.Language learning starts from 'listening'. It is a prerequisite to learning all the other skills in the language. At first, the child starts listening to the sounds of people around him and then observes how they speak and started speaking, then later development of reading and writing skills takes place.hence, it is clear that the input (receptive skills) a child hears in each language may affect vocabulary size according to the principle which states that children learn what they hear the most.HintThe productive skills of language are speaking and writing because these skills can measure learner's ability to produce language. Both skills are concerned with language product or output through speech or written tests.