I believe the correct answer is B.
Earth's magnetic field was reversed than today's magnetic field, 65 million years ago.
Answer: reversed
<u>Explanation:</u>
The present North and South pole on the geographical region above Earth crust is opposite beneath the same as North to be South and South to be North pole. Before 65 million years, Earth polarity was same beneath as currently above Earth's crust. It reversed and the Earth faced the mass extinction.
The magnetic field of the Earth was opposite to what it is found today, 65 million years ago, which is considered to be the time for mass extinction. It has been found that the magnetic field which consist of polarity as north and south is opposite to be what is found on the geographical land to the one found below the Earth surface.
Answer:
Explanation: John Brown was a militant American abolitionist. He becane a martyr during the raid on the federal arsenal at Harpers Ferry. His ideas and actions incited the slave insurrection that lead to the American Civil War.
