How does financial resources affect the development of a country

When employing the core learning system, reading text books and attending class are important ways to knowledge.

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?

Which factor contributed to the rise of african empires such as ghana and mali?