1. PART A: Read the sentence from paragraph 2: "Churning currents in the molten rocks below propel them along like a jumble of
conveyor belts in disrepair." How does this sentence contribute to
the reader's understanding of the topic of the article?
OA by describing the geologic features that can form along each of
the three types of tectonic boundaries
B by providing an analogy connecting the concept of moving
tectonic plates to a concrete image
OC by signaling a shift in the structure of the article to a
chronological narrative
OD by connecting the introduction of the article to the central idea
that the lithosphere is unique to planet Earth