Final answer:
The Canadian Shield is economically significant due to its large and valuable mineral deposits that support the mining industry and international trade.
Step-by-step explanation:
The Canadian Shield provides economically significant contributions through its large, valuable mineral deposits, which allows Canada to engage in international trade. The Canadian Shield contains a wealth of minerals such as copper, gold, nickel, silver, and uranium, as well as diamond mines and rare earth elements that are crucial for technology such as computer screens, electric car batteries, and computer hard drives. These resources are essential for Canada's mining industry, providing jobs, fostering economic activity, and allowing for the export of minerals which are in demand globally.