What is a notable design element of the QX55's rear?

The notable design element of the QX55's rear is the distinctive liftgate with a sloping rear roofline. This feature plays a critical role in defining the vehicle's sporty and coupe-like appearance, which is part of its overall modern aesthetic. The sloping roofline enhances the vehicle's aerodynamic profile and contributes to a sleek silhouette. This design choice not only supports an attractive exterior but also helps in maintaining efficient performance, reducing drag when driving.

Additionally, this stylistic decision aligns with current automotive trends where a blend of sportiness and elegance is highly valued, particularly in the crossover segment. By contrast, other options may suggest generic or less dynamic features that do not emphasize the unique character and style of the QX55 as effectively as the sloping rear roofline does.