Study Figure 1, which shows a cross-section of a river channel at a meander bend in its middle course.

Which of the following statements correctly identifies the dominant processes and features at point P P\,P and point QQQ?
PPP is a zone of high water velocity where lateral erosion dominates to form a river cliff; QQQ is a zone of low water velocity where deposition dominates to form a slip-off slope.
PPP is a zone of low water velocity where deposition dominates to form a slip-off slope; QQQ is a zone of high water velocity where lateral erosion dominates to form a river cliff.
PPP is a zone of high water velocity where vertical erosion dominates to form an interlocking spur; QQQ is a zone of low water velocity where lateral erosion dominates to form a floodplain.
PPP is a zone of low water velocity where lateral erosion dominates to form a levée; QQQ is a zone of high water velocity where deposition dominates to form an estuary.