Concept:CLIL is an acronym for an educational approach that combines subject content learning with foreign or second language acquisition.Explanation:The full form of CLIL is Content and Language Integrated Learning.It is a dual-focused method where students learn both the subject matter and a new language simultaneously.The term was coined by David Marsh.CLIL helps students learn language naturally through meaningful content, even if they are not initially motivated.It is often used in multicultural classrooms to improve real-life communication skills and cross-cultural awareness.Answer:Option C: Content and Language Integrated Learning