Final answer:
The term for a systematic method of communicating ideas through mutually understood signs and symbols is called 'language.' It is a specific system used within a community to convey complex thoughts and emotions.
Step-by-step explanation:
Any systematic method of communicating ideas, attitudes, and intent through the use of mutually understood signs, sounds, or gestures can be called language. Language is a communication system that involves using words and systematic rules to organize those words to transmit information from one individual to another. While many forms of communication exist, it is the structured and agreed-upon system of symbols and rules found in language that allows us to convey complex thoughts and feelings.
Communication is a broader term that encompasses all the ways in which animals and humans transfer information to one another, including language, but also nonverbal cues and signals. Language is unique in that it involves arbitrary symbols called words, which can be vocalized and often written down, enhancing the specificity and permanence of communication. While different cultures have various systems of symbols, it is the shared understanding within a community that forms the basis of a language. This shared system furthers social and cultural norms and allows people to express a wide range of ideas and emotions effectively.
In summary, the answer to your question is language, because it specifically refers to the system of communication that uses arbitrary symbols to convey detailed and complex meanings.