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.Let's understand it briefly:Productive skills: The productive skills of language are speaking and writing because these skills can measure learners' ability to produce language.Both skills are concerned with language product or output through speech or written tests.Receptive 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 comprehend language. SkillsDescriptionReceptiveListeningReceiving information through the ears.ReadingProcess of looking at a series of written words/symbols and getting meaning from them.ProductiveSpeakingDelivery of information through the mouth.WritingProcess of using symbols (letters of the alphabet, punctuation, and spaces) to communicate thoughts in a readable form. Hence, from the above-mentioned points, it becomes clear that Skills of Expression or Productive Skills include Writing and Speaking.