College fair? I really cant say based off the lack of context clues in the question and no additional information.
True The history of the Philippines is believed to have begun with the arrival of the first humans using rafts or boats at least 709,000 years ago as suggested by the discovery of Pleistocene stone tools and butchered animal remains associated with hominin activity.
Yes the two goods are therefore substitutes <span>if the price f a good X rises, causing the demand for good Y to fall for example two substitutes tea and coffee and the price of tea will be increase when the demand of coffee will decrease because now more people will demand tea and when demand increases price increases.
Hope it helps.
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