At the end of the 1970s, the respective prices of fish dinners and lamb dinners in Sydney's fine dining restaurants were approximately the same. By 1983, following a period of drought, the price of a lamb dinner in fine-dining restaurants in Sydney was twenty percent higher than the price of a fish dinner at similar restaurants. Over the same period, the 'health industry' had been commending virtues of eating fish rather than red meat and increased fish consumption had resulted in a threat to the sustainability of fish species, especially important to the fine-dining restaurant trade. How should the government respond? Explain using appropriate diagram.