Passage V

Seashore cliffs often lose rock or sediment to wave erosion. Figure 1 shows cliff compositions; cliff heights, in meters (m); and the net change in mean high water mark (MHWM), in m, from 1880 to 1970 along a section of shoreline. A net negative change in MHWM indicates a net loss of rock or sediment and a net positive change indicates a net gain of sediment.

Table 1 shows the percentage of a year that vertical sections of a cliff are exposed to wave erosion.

Figure 2 shows Cliff E and F erosion rates, in cm/yr, as they relate to percentage of a year that a cliff section is exposed to wave erosion.

26. Based on the information in Table 1, a cliff section with a height of 4.0–4.5 m above the zero baseline
would be exposed to wave erosion approximately what percentage of a year?

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

From table 1, it can be seen that the higher the cliff section height, the smaller the percentage of a year cliff section is exposed to wave erosion. So when the height is 4.0-4.5 m, the percentage of a year should be less than 0.5, and the J option meets