Text 1: Geologist Park argues that the Earth's magnetic field protects life from harmful solar radiation. By deflecting charged particles streaming from the Sun, the field prevents the atmosphere from being stripped away — a fate that may have befallen Mars when its own field weakened.
Text 2: Geologist Singh accepts the magnetic field's protective role but cautions against treating field reversals — when north and south magnetic poles swap — as catastrophic. Past reversals occurred repeatedly across geological history without mass extinctions; the field weakens during transitions but does not vanish, and life has consistently persisted through them.
Both authors would most likely agree that
- A
Mars currently has a strong magnetic field.
- B
Earth has no magnetic field.
- C
magnetic field reversals always cause mass extinctions.
- Dcheck_circle
Earth's magnetic field plays a protective role.
Explanation
Both accept the field's protective role; they differ on the consequences of reversals. A is shared. B, C, and D contradict at least one author.