Question

a large boulder moved there by a glacier is a:

• drumlin
• moraine
• glacial erratic

Explanation:

A large boulder moved by a glacier is called a glacial erratic. Drumlins are streamlined hills formed by glacial action, and moraines are accumulations of glacial debris (like rocks, soil) left behind by glaciers, not single boulders moved by glaciers. Glacial erratics are rocks that differ from the surrounding bedrock and are transported by glaciers and deposited elsewhere.

Answer:

glacial erratic (the option corresponding to "glacial erratic" should be selected)