Based on Figure 2, which of the following graphs best shows the average Se contents of the sediments taken from a depth of 7 cm ? m arshplain lowerm arsh tidalflat average Se content (mg/kg) average Se content (mg/kg) average Se content (mg/kg) average Se content (mg/kg) 0 m arshplain lowerm arsh tidalflat 0 m arshplain lowerm arsh tidalflat 0 m arshplain lowerm arsh tidalflat 0 45 GO ON TO THE NEXT PAGE. ACT-H11 4 4 22. According to Figure 3, the average OM contents, in percent by mass, of the marsh plain sediment and the lower marsh sediment taken from a depth of 5 cm were closest to which of the following? marsh plain lower marsh
