Final answer:
The conditions that helped create the Everglades include rainfall, flooded forests, and rising and falling sea levels. The conditions causing the Everglades' decline include tree removal, land clearing, and human activities leading to climate change.
Step-by-step explanation:
In creating the Everglades, conditions such as rainfall, flooded forests, and rising and falling sea levels played a significant role. On the other hand, the decline of the Everglades can be attributed to conditions such as tree removal, land clearing, and human activities leading to climate change.