Here's why:
* Arbitrary symbols: Language uses words and sounds that have no inherent connection to the things they represent. For example, the word "cat" doesn't sound like a cat, but we have agreed to use that sound to represent the animal.
* System: Language is a structured system with rules for grammar, syntax, and vocabulary. This system allows us to combine symbols in meaningful ways to convey complex thoughts and ideas.
* Communication: Language is primarily used for communication, enabling us to share information, express emotions, and build relationships.
While other forms of communication exist (e.g., body language, music), language is unique in its reliance on arbitrary symbols and its complex structure.