Which of the following qualities is associated with an ideal breeding gilt?

An ideal breeding gilt is characterized by multiple physical qualities that contribute to her overall reproductive potential and performance. Each of the listed qualities plays a significant role in determining the effectiveness and productivity of a gilt within a breeding operation.

Arch refers to the overall structure and shape of the gilt's body, particularly in the back and spine. A well-arched body contributes to soundness and balance, which are crucial for sustained health and productivity.

Spring pertains to the rib structure and width. Gilt's with good spring have a wide rib cage that allows for optimal lung capacity and better overall health. This can also indicate a higher capacity for gestation and nourishment of piglets.

Curvature of the rib is an important trait as it influences the capacity of the gilt to carry and nurture a litter. A sufficient curvature allows for proper development of the fetus and is indicative of the gilt's overall condition and efficiency.

Since all these attributes contribute positively to the reproductive capabilities and overall health of the gilt, they collectively represent the ideal qualities of a breeding gilt. Thus, recognizing that all the mentioned characteristics are important leads to the understanding that the best answer encompasses all of them.