Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.
Irrigation causes an increase in salt which will kill plants. Pesticides poison water making it undrinkable. Pesticides can contaminate the soil for long periods of time.
The appropriate response is names of clades. Clade is a gathering of creatures accepted to have developed from a typical progenitor, as indicated by the standards of cladistics. Every clade comprises of a familial living being and the greater part of its developmental relatives.
Structure affects function in biology through the process of selection or natural selection. And also along the chain of causation, to the goal or success.
Example a tree does not grow fruits for any reason but simply because it has developed.