What coastal erosion feature does the arrow point to in the image below?

a photograph showing an exposed island of rock surrounded by the sea. the arrow is pointing to the raised rock area.

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sea arch
sea cave
sea cliff
sea stack

The answer is "sea stack" or the fourth option. Sea stacks are tall pieces of land in the ocean that had been eroded all the way to look like a stack of rocks. Sea stacks look like this:

Hope this helps!

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

if you mean hydrogen and oxygen then water is the product