Final answer:
The rift valley is the term that does not fit the pattern, as it is associated with divergent plate boundaries, while the other terms are related to convergence.
Step-by-step explanation:
The student is asked to determine which of the given options does not fit the pattern among Continental arc, Volcanic arc, Island arc, Rift valley, and Convergent plate boundary. These terms are related to plate tectonics and the formation of different geological features. A Continental arc, Volcanic arc, and Island arc are features commonly associated with convergent plate boundaries, where two tectonic plates collide and one is forced below the other, this process often creates volcanoes and mountain ranges.
On the other hand, a Rift valley forms at a divergent boundary, where two plates move apart from each other, such as the Mid-Atlantic Ridge, making it the term that does not fit the pattern established by the other options which are associated with convergent boundaries.