Question

which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?
he proposed that plates carry parts of the seafloor
he theorized that pieces of earth move for a limited time
he suggested that the asthenosphere is broken into segments
he observed seafloor cracks similar to existing cracks in the continents

Explanation:

John Tuzo Wilson's contribution to plate tectonics includes the theory that plates carry parts of the seafloor (oceanic lithosphere) and continents (continental lithosphere). The other options: theorizing Earth's pieces moved for a limited time is not his main contribution; suggesting the atmosphere is broken into segments is unrelated; observing seafloor cracks similar to continental cracks isn't his key work. His key was the idea of plate movement with seafloor components.

Answer:

He proposed that plates carry parts of the seafloor