Describe any plant or animal life living in your sphere.
One of the examples of the animals of earth are sloths. One of the plants are wheat.
How does your sphere depend on other spheres?
The biosphere depends on other spheres by needing them. Seeing as the biosphere is actually all of the smaller spheres, this shows that the biosphere depends on all of the other spheres to BE the biosphere. The other spheres provide what is necessary to be able to live (biosphere).