Which of the following describes a characteristic of anti-G suits?

Anti-G suits are designed to help maintain blood circulation and prevent blood from pooling in the lower parts of the body during high-G maneuvers, which can lead to a condition known as G-induced Loss Of Consciousness (GLOC). By applying pressure to the abdomen and legs, these suits assist in increasing blood flow to the brain, thus helping to keep the pilot conscious and functioning optimally during intense maneuvers. This characteristic is crucial for pilots and crew members, as maintaining cerebral blood flow is essential for situational awareness and reaction times in high-stress flying conditions.

The other options do not accurately reflect the primary function of anti-G suits. They do not decrease oxygen levels; in fact, maintaining oxygenation is critical, especially during high-G flights. While anti-G suits might help with some aspects of stability, they do not specifically reduce the number of cone cells in the eyes, nor do they eliminate motion sickness, which can be caused by other factors such as vestibular system responses.