Which postural changes are commonly observed during pregnancy?

During pregnancy, significant postural changes are commonly observed due to the physiological adaptations that support the growing fetus. One of the major changes is lumbar spine lordosis, which is the inward curvature of the lower back. As the pregnancy progresses, the increasing weight of the fetus causes a shift in the center of gravity, leading to an accentuation of this curvature. This is often accompanied by an anterior pelvic tilt, where the pelvis tilts forward, further contributing to the increased lumbar lordosis.

These alterations are adaptive responses to the structural changes occurring in the body and are aimed at providing balance and support. They can affect posture and the way weight is distributed, making option B the correct choice, as it accurately describes these typical changes during pregnancy.

In contrast, the other choices present postural adjustments that do not align with the physiological changes noted in pregnant individuals, thus making them less relevant in this context.