How did the incans organized trade and networks of roads them to rule such a vast mountain empire?

The photo shows a shopping mall in beijing, china. inside, there are food sites selling pizza and hamburgers and closing stores selling blue jeans and basketball sneakers. these items have become popular around the world because

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases