The ability to think about language as a system is called :

Correct option is A

The ability to think about language as a system is called 'metalinguistic awareness'. This refers to the understanding and awareness of how language works. It includes the ability to think about and analyze language as an abstract system, separate from its content or meaning. Metalinguistic awareness enables individuals to reflect on and manipulate the structure of language, understand language rules, and recognize language as a separate entity from the objects or ideas it represents. This awareness is crucial for language learning and literacy development, as it allows learners to understand and apply language rules and structures.