Human language is more than a communication system

Human language is more than a communication system. What are the unique properties of human language that make it different from communication systems used by other species?

Review the literature on the selected topic. For each topic, use at least two peer-reviewed articles that can answer the question(s) related to it. Engage your critical thinking skills. Carefully summarize the evidence you have found and then critically examine it. For instance, ask yourself if the available evidence is sufficient to support the interpretations that researchers have proposed, and/or whether there are ambiguities and unknowns.