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
C by signaling a shift in the structure of the article to
a chronological narrative
D by connecting the introduction of the article to the
central idea that the lithosphere is unique to
planet Earth