Which term describes a communication system that uses systematic rules to organize words to transmit information from one individual to another?

Why are field trips an important part of education

Before tuberculosis was understood to be a communicable disease, and before the discovery of antibiotics to treat it, a major outbreak could kill or cripple a significant portion of a nation’s labor force. how would such an event affect the economy? illustrate the effect by dragging to shift either the aggregate demand curve or the long-run aggregate supply curve.

Which of the following was not a result of early humans increasing proficiency at finding food