What are the two parts of an organism's habitat with which it interacts?
Biotic and Abiotic factors are the two parts of habitat with the organism interacts.
What are the levels of organization within an ecosystem?
1. Organism
2.Population
3.Community
4. Ecosystem
Why do you find different kinds of organisms in different habitats?
Because many different organisms require different conditions for example the forest mushroom needs a cold, dark and damp climate in order for it to grow. While the cactus needs dry, and hot conditions.
Think about what will soon start happening within Belgrade. How do animals prepare for such a change?
Animals will start collecting food and finding shelter for their winter hibernation.

Extra: I think that over time organisms adapted to their environment and that is why they look they way they do today