Final answer:
The four agents of erosion are water, gravity, ice, and air, each contributing to shaping the Earth's landscape and transporting sediments.
Step-by-step explanation:
The four agents of erosion are water, gravity, ice, and air. These natural forces are responsible for the transportation of fragments and the wear and tear of the Earth's surface. Water, in the form of flowing rivers or waves, can carve out valleys and create sedimentary deposits in flood plains. Gravity causes rocks and soil to move downslope, often resulting in landslides or soil creep. Ice, through the action of glaciers, grinds and shapes the landscape as it moves. Lastly, air, or wind, can erode weaker materials like sand and dust, shaping deserts and other landscapes.