Seismologists Kaiqing Yuan and Barbara Romanowicz have proposed that the magma fueling Iceland's more than 30 active volcano systems emerges from deep within Earth. The great depths involved-nearly 3,000 km-mark Iceland's volcanoes as extreme outliers; __ many of Earth's volcanoes are fed by shallow pockets of magma found less than 15 km below the surface. Which choice completes the text with the most logical transition? A. consequently, B. in addition, C. indeed, D. nevertheless,

## Step 1<br />The problem is asking us to choose the most logical transition word for the given text. The text discusses the unique characteristic of Iceland's volcanoes, which are fueled by magma from nearly 3,000 km deep within the Earth. This is in contrast to many of Earth's volcanoes, which are fed by shallow pockets of magma found less than 15 km below the surface.<br /><br />## Step 2<br />We need to choose a transition word that logically connects the two sentences. The transition word should indicate a contrast or contradiction, as the second sentence is presenting a fact that contrasts with the first.<br /><br />## Step 3<br />Looking at the options, "consequently" implies a result or consequence, "in addition" implies adding more information, "indeed" is used to emphasize a point, and "nevertheless" is used to introduce a contrast or contradiction.<br /><br />## Step 4<br />Given the context of the text, the most logical transition word is "nevertheless". This is because the second sentence is presenting a fact that contrasts with the first.