______ communication is the exchange of a message across a communication channel from one person to another

After Sam watches his favorite TV hero wrestle the villian to the

ground, he tries to use the same wrestling moves on his older brother, who is teasing him. The best explanation for Sam's aggressive behavior would be the __________ theory. Fill in the blank with correct word

Stress produces many of its effects on health and well-being by its influence on which system?

a. The respiratory system b. The circulatory system c. The digestive system d. The immune system