How are all animals like as heterotrophs? All animals have multiple cells.
All animals are made up of cells organized into tissues.
All animals have two copies of each chromosome.
All animals need food to survive.

All animals need food to survive.

Explanation:

The useful information about how they use the Savanna grasses to survive is that they eat at different growth periods of the grass. 
Niche partitioning is the process whereby competing species use the environment differently in a way that helps them to coexist. Natural selection drives competing species into different patterns of resource use or different niches. Coexistence is obtained through the differentiation of their realized ecological niches.