The Austral Ridge and the Tuamotu Ridge chains have moved closer together whereas the Hawaiian Islands have remained stationary.

　　25. Which of the following, if true, would best support the authors statement that hot-spot activity may explain the mutability of continental plates?

　　 Hot spots move more rapidly than the continental and oceanic plates.

　　 Hot spots are reliable indicators of the age of continental plates.

　　 Hot spots are regions of volcanic activity found only in the interiors of the continental plates.

　　 The alignment of hot spots in the Pacific Ocean parallels the alignment of Pacific Ocean islands.

　　 The coastlines of Africa and South America suggest that they may once have constituted a single continent that ruptured along a line of hot spots.

　　26. The authors argument that hot spots can be used to reconstruct the movement of continental plates is weakened by the fact that

　　 hot spots are never found at the boundaries of plates

　　 only extinct volcanoes remain after a plate moves over a hot spot

　　 lava flow patterns for all hot spots have not been shown to be the same

　　 the immobility or near immobility of hot spots has not been conclusively proven

　　 the changing configurations of islands make pinpointing the locations of hot spots difficult

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