A deposit of sediment that marks the farthest forward advance of a glacier is called a

medial moraine.

terminal moraine.

lateral moraine.

glacial till.

B.

Explanation:

Supraglacial (on top of the ice)

englacial (within the ice)

sediments that slide off the melting front of a stationary glacier can form a ridge of unsorted sediments called an end moraine.

The end moraine that represents the farthest advance of the glacier is a terminal moraine.

Sediments transported and deposited by glacial ice are known as till.