Read the following text and answer the question.

Zebras are animals that resemble the horse. They walk and gallop like horses, but do not move as quickly. Unlike the horse, zebras have not been domesticated and run wild.

Many zoologists believe that a zebra’s stripes act as camouflage. The vertical stripes blend into the vertical grasses that grow in its habitat. Even though the strips are white on a black background, the zebras' main predator, the lion, is color-blind and when standing in tall grass may not be seen.

Zebras live in social groups. The leader of the group is the stallion. The females that live in the group are called fillies. They communicate by barking, snorting, or whinnying. A zebra’s ears communicate if it is feeling calm. If its ears are standing straight up, it is feeling calm. When the zebra’s ears are pushed forward, it is feeling frightened. Predators that threaten the zebra are lions and hyenas. Other large cats also hunt the zebra. When a herd of zebras is threatened, they will form a circle with all their members facing out. They will kick and bite to defend themselves. 

Zebras are mostly hunted for their skin, but they also struggle because much of the land where they graze has been taken over by farming.

Source: kidskonnect.com

Based on the text above, which of the following statements is NOT related to the zebras’ camouflage?