Q: If the electric conductivity of the Earth's outer core is slightly decreased, then which one of the following is the most immediate effect?
(a)Stronger geomagnetic field
(b)Weaker geomagnetic field
(c)Reversal of magnetic field
(d)Disappearance of declination
Correct Answer: (b)
The correct answer is (b): Weaker geomagnetic field. Subject: Geography | Sub-topic: Geomorphology Note: This answer was determined through AI-based research. Verify against the official answer key when available.