B. there are four hemispheres in the world
1.Southern hemisphere
2.Northern hemisphere
3.Western hemisphere
4.Eastern hemisphere
The choice that is not a major similarity or difference between freshwater and marine ecosystems is B. <span>ocean and freshwater system conditions generally remain constant throughout the year.</span>
Deep ocean trenches, volcanoes, island arcs, submarine mountain ranges, and fault lines are examples of features that can form along plate tectonic boundaries.
