Why might political parties write platforms before presidential elections

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?

What would you call a political system that is only meant to last for a short time

Located in siberia , the is the world's largest forest. a: tundra b: coniferous c: volga d: taiga