All need water. All need to eat. Herbivores eat plants. Some carnivores eat the animals that eat the plants, and some eat other carnivores.
Omnivores eat both plants and animals.
The network of dependence between animals and plants of the Okavango, or any ecosystem, is called the food chain. Spinning a Food Web Divide your students into groups of 6 to 12 and ask the groups to form circles. Each student in a circle will play the part of an animal found in the Okavango Delta or the grass and trees which some of the animals eat. Animals could include the lechwe, pangolin, termite, wild dog, cheetah, hippopotamus, or crocodile. Begin with a ball of yarn and a student pretending to be the grass.