Final answer:
The geological feature that would take the longest to change is the locations of continents, due to the slow process of continental drift.
Step-by-step explanation:
The question asks which geological feature among the given options would take the longest amount of time to change. Locations of continents change due to the process of continental drift, and this is a very slow process that can take millions of years to significantly alter the position of continents. Therefore, the correct answer is C. Locations of continents.
Continental drift is part of the theory of plate tectonics, where the Earth's lithosphere (crust and upper mantle) is broken into plates that slowly move over the asthenosphere (the semi-fluid layer beneath the lithosphere). This movement is what causes the continents to drift. For example, the creation of the Hawaiian island chain is a result of volcanic activity over a hot spot, which is much faster in comparison. However, the movement of entire continents, as seen in the drift of continents, is a much slower process.