*Zebras eat from shrubs, grass and other plants.
*Plants need the sunlight for surviving.
*Clearing this out I believe the sunlight provides food for the zebra as it acts a fundamental need of the growth of plants. Without it plants are not going to grow, and causing the zebra have no food.
*If the sun dissappear we die, plants die, food is gone and zebras die...
-Hope I helped you out . Good luck!