Answer:
Symbols.
Step-by-step explanation:
Animal and humans both have different modes f communication. But among all forms of communication, the most unique form of language is of humans. Human language can be seen as a web woven intricately and uniquely.
Different groups of animals have different ways of communicating, but it is limited.
Whereas, on the other hand, human language is limitless. Various words, phrases, and sentences can be used to form a new sentence with new meaning.
Animals can communicate only through gestures and sounds, whereas humans communicate through symbols also with gestures and sounds.