The ocean-floor feature that is associated with trenches is a subduction zone. An oceanic trench is characterized by a narrow and very deep depression on the sea floor. This depression is caused by a subduction zone wherein two plate boundaries converge and one sinks at the bottom of the other plate, forming a thin and deep region between the two plates.
Explanation:
1. Using oil dispersants has the following benefit -
- Helps in dispersing the oil over a large surface rather than being spilled onto a smaller area, hence effectively reducing the oil concentration from any particular surface.
2. Negative consequences of using a dispersant is -
- The negative consequences of using a dispersant is that, while dispersion of oil, dispersants tends to adversely effect the organisms and planktons of a larger area.
The flow of water depending on how fast the flow is could change the delta. Or it could cause erosion causing different pathways for water and sediment to go.