They needed more slaves to pick the cotton.
Sorry if this is wrong.=^\
The answer is you’re concerned of biology, <span>Biology is an asset of the society in many
ways. One, it allow humans to develop a
good understanding of the world, in terms of all living beings. That’s why biology
leads to discoveries in the medical field, and in the environment. </span><span>
Without biology a doctor would be clueless and scientists
would have no understanding of all the amazing living creatures in this world.
<span>Biology is essential to the development of our
future.</span></span>
Shows the situation of Japan after the bombing.
On the night between March 9 and 10, 1945, 334 B-29 bombers rained hell over the densest city on the planet. Nearly half a million incendiary bombs hit Tokyo in Operation Meetinghouse, probably the worst mass bombing of civilians by aerial bombing ever. Their numbers, estimated between 80,000 and 140,000 fatalities, are, on average, worse than those in Hiroshima (70,000 to 122,000).