Forests, mountains, rivers, and marshes are examples of the wide variety of ecosystems in net york state. The diversity of these ecosystems is most likely the result of?

The main answer is Climate. Here's why:

The climate of different places can be hot, cold, or just right. Because New York is on the eastern side of the United States (which is a very rainy place), there is enough water for forests, marshes, and rivers. There are mountians because of the land being above sea level, likely caused by erosion or earthquakes.