Which of the following does NOT contribute to weathering?

Transportation does not contribute to weathering. Weathering is the process that breaks down rocks and minerals into smaller particles through physical, chemical, or biological means. It involves the direct interaction of elements like water, wind, and gravity on geological materials.

Water is a significant agent of weathering, as it can lead to both physical weathering through freeze-thaw cycles and chemical weathering by dissolving minerals. Wind can erode surfaces and wear down rocks in arid environments, contributing to mechanical weathering. Gravity plays a vital role in weathering through processes like mass wasting, where materials are moved downhill, subjecting them to different weathering processes along the way.

On the other hand, transportation refers to the movement of weathered materials from one location to another, which is part of processes such as erosion and sedimentation rather than the weathering itself.