Final answer:
In northeastern Ontario, there is evidence of a large glacial lake. The presence of glacial landforms such as eskers, moraines, and drumlins indicate the existence of a glaciated landscape.
Step-by-step explanation:
In northeastern Ontario, there is evidence of a large glacial lake. The presence of glacial landforms such as eskers, moraines, and drumlins indicate the existence of a glaciated landscape. Glacial lakes, formed by the meltwater from receding glaciers, often leave behind distinctive landforms and sediments.