Sandra is actually looking at the borders of the countries. The correct option among all the options that are given in the question is the first option or option "A". The dark lines separating each of the countries on the map of Europe are actually the borders of the countries in Europe. I hope the answer helps you.
The Hoover dam, and it is used for flood and silt control, hydroelectric power, agricultural irrigation, and domestic water supply.
The answer is d that glaciers erode and pluck from the entirety of the valley floor (including both the floor and walls of the valley) and the result is the U-shape of the ensuing valley as opposed to the typical V shape of valleys resulting from large streams or rivers.
Fish, Arthropods, Amphibians, and Reptiles all evolved during the Paleozoic Era.
Hope this Helps!
