Answer:
a dam flooding a valley
Explanation:
It would be a dam flooding a valley because in a new ecosystem there would then be a increased load of phosphorus and nitrogen and increased algae growth.
If is 67 because of the truck kbsisbe blue
The correct answer is (d) all of the above.
The most important phenomenon of the earth's crust is that it is not stable. It keeps on changing with respect to time called as continental shift. Continental shift squashes and changes a continent in such a way that it is very hard to find out its early history. Continental shift results in earthquakes, volcanoes and tsunamis. The movement of tectonic plates is the main reason for continental shift which leds to the natural calamities such as volcanoes, earthquake and tsunami on the local environment.
