Bantu Ya Saling Membantu

tolong diperjelas gambarnya dong

1. Many ways of communicating.
2. The basic function of a signal is to impinge upon the environment in such  a way that it attract attention.
3. The synonim of Impinge is Affect.
4. "it" refer to signal.
5. They were invented because the means of communication intended to be used for a long distance and extended periods are based upon speech.