The terms flora and fauna refer to the plants and animals of a particular place at a particular time and are dependent upon the specific region, climate and time period. These environments could be grasslands, redwood forest or savannah.
Native flora refers to those plants that are to the area. They grow without human help or cultivation. Another category is horticultural flora, plants grown for food or consumption. One example is the giant redwood tree found in Northern California and can range in age from 800 to 1500 years old. A variety of birds and animals life there.
Another type of plant is found in the deserts of Angola, one with large leaves that wilt during dry times and swell when there are rains.
Likewise fauna falls into similar categories. Animals live above and under water, in deserts and in rainforests. They can be tiny creatures like protozoans and large like elephants. They exist in artic tundras and in coral reefs. Specific types of birds must have environments conducive to their life. Same is true for all animals, big and small.
Your task is to define a setting by its flora and fauna. Make two lists, one for each. If necessary, research what would grow/live in the environment that you are considering. After your list is complete, think of a way that the elements influence story. For example, tusk hunters kill elephants in order to make money to survive. Squirrels remove nuts and fruits from trees before humans can harvest them. Deer eat flowers and leaves.
Write a story in which flora and fauna play an important role.
Have fun with this one.