Which statement correctly defines a moraine?

• A. A dune field near coasts
• B. A river delta formed by sediment
• C. A weathering process producing sand
• D. A glacial deposit of rock and soil

Answer: (D)

Moraines are accumulations of rock and soil carried by a glacier and deposited as the ice melts or retreats. This material, often unsorted and ranging from large boulders to fine clay, can form along the sides of the glacier (lateral moraines), at the front (terminal or end moraines), or across the ground once covered by the ice (ground moraines). This glacial origin and deposition pattern distinguish moraines from dunes (wind-formed sand), deltas (river-formed sediment at river mouths), or sand produced by weathering processes. In short, moraines are direct leftovers from glacier movement, marking where ice once carried and dumped debris.