The theory that pieces of Earth’s lithosphere are in constant motion, driven by convection currents in the mantle.
A. convergent boundaries
B. Pangea
C. plate tectonics
D. convection currents
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Grammar › ViewMany islands are below _______ and only the concrete walls can prevent them from disappearance.
A. human activity
B. greenhouse gas
C. sea level
D. ice cap
Academic Vocabulary › View
What does the word ‘cause’ mean?
A. a challenge that the main character or character face
B. something that brings about an effect or a result
C. someone or something that contributes to an accomplishment, result or process.
D. evidence found within a particular text used to support or explain conclusions, opinions, and/or assertions about the text itself
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