Answer: Overpopulation of the wildebeest's primary food source, plants.
Explanation: The plants in the environment may become overpopulated if the local plant-eating wildlife are hunted frequently. Plants include grass, bushes, and shrubs. The same goes for any other species, depending on their food source and it's availability, the species may or may not survive if their food source is depleted.
There are two large ovoid organs called the thalamus, which form most of the lateral walls of the third ventricle of the brain. A variety of receptors transmit signals from the thalamus to the cerebral cortex. Thalamus is anatomically situated adjacent to the midline third ventricle in the brain.
