Why do people say bless you when you sneze?

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?

Toward the end of the roman empire, what caused a decrease in the use of coined money tell me now

11. why do citizens have to register to vote?