Which of the following is the best definition of a scientific theory? a. a broad, well-supported explanation of related observations or events b. a description of a natural phenomenon that is always observed to occur under specific conditions c. a plausible answer to a scientific question that is used to guide research d. a highly tentative statement about the natural world that is likely to be significantly changed or discarded

1. seamount a raised footwall block between normal fault creates this 2. syncline break between rocks where a hanging wall rises relative to a footwall 3. hot spring on rolling hills, this a dip between hills 4. volcanic neck created when a block with hanging walls slips down between normal faults 5. caldera underwater volcano that never reaches above sea level 6. horst natural hot water on earth's surface containing many minerals 7. graben underwater volcano whose top is eroded flat by waves 8. crater less than a mile in diameter; looks like a bowl at the top of a volcano 9. guyot magma that filled the central vent that remains after the volcano has eroded 10. reverse fault over 1 mile in diameter; looks like a bowl over a volcano