Final answer:
Companies build plants in the Great Lakes Saint Lawrence lowlands due to access to natural resources, proximity to labor and markets, and the established infrastructure.
Step-by-step explanation:
Companies build plants in the Great Lakes Saint Lawrence lowlands for various reasons. One major reason is the access to natural resources. The Great Lakes region is rich in natural resources such as iron ore, coal, and water, making it an ideal location for manufacturing plants that require these resources.
Another reason is the proximity to labor and markets. The densely populated Northeast provides a large customer base for manufactured products, and being close to these markets reduces transportation costs. Additionally, the availability of a skilled labor force in the region makes it easier for companies to find workers.
Lastly, the historical presence of manufacturing in the area has created an established infrastructure and supply chain that supports the industry. This infrastructure includes transportation networks, utilities, and expertise in manufacturing processes.