Why does a wing rise after touchdown in a crosswind landing?

During a crosswind landing, the phenomenon of a wing rising after touchdown is typically caused by the lift differential that occurs along with a rolling moment. When an aircraft lands in a crosswind, the ailerons are often used to counteract the sideways push of the wind. If one wing experiences more lift than the other, typically due to the angle of attack being higher on the upwind wing, it can lead to an imbalance in lift.

As the downwind wing creates less lift due to the greater angle of attack on the upwind wing, the upwind wing tends to rise as the aircraft experiences a roll tendency. This lift differential combined with the aircraft's tendency to lean into the wind results in the upwind wing lifting higher than the downwind wing, which can cause difficulties in maintaining the desired alignment on the runway.

The other options do not directly address the specific dynamics of lift differential in a crosswind scenario. A high airspeed does not inherently cause a wing to rise after touchdown, incorrect flap deployment pertains to general performance and handling rather than to a specific crosswind situation, and uneven weight distribution typically results in a different set of handling characteristics. Thus, the lift differential with a rolling moment is the primary reason for the wing lift