Final answer:
The subject of this question is Geography. Debris and oil dripping from cars collect in the low point or bottom of the lane due to the force of gravity.
Step-by-step explanation:
The subject of this question is Geography. The lane mentioned in the question is likely referring to a road or street. In Geography, the study of landforms, there is a concept called sedimentation which refers to the process of materials being deposited or collected in an area.
In this case, the debris and oil dripping from cars collect in the low point or bottom of the lane due to the force of gravity.