Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

[Q]: Paragraph- Sent 1: The Glory of Melaka: In the early days, if you were not a pirate or a mosquito, Melaka was not much of a place to live.
Sent 2: The land was infertile, just a swampy plain, the river small and sluggish.
Sent 3: But it had a sheltered harbor, protected from the monsoons by neighboring Sumatra.
Sent 4: Later, the strategic location and deep-water channel close to the coast brought in the bigger vessels of the trade-wind traffic crossing the Indian Ocean.
Sent 5: The first to realize the larger commercial potential, as so often throughout the country's subsequent history, were the Chinese.
Sent 6: In 1409, under a new directive from Emperor Chu Ti to pursue trade in the South Seas and the Indian Ocean, a Chinese fleet of 50 ships headed by Admiral Cheng Ho called in at Melaka.
Sent 7: They made Parameswara an offer he could not refuse: port facilities and an annual financial tribute in exchange for Chinese protection against the marauding Thais.
Sent 8: In 1411, Parameswara took the money to Beijing himself, and the emperor gratefully made him a vassal king.
Sent 9: Twenty years later, the Chinese withdrew again from the South Seas trade.
Sent 10: The new ruler of Melaka, Sri Maharajah, switched his allegiance to the Muslim trading fraternity by marrying into the Muslim faith, wedding the daughter of a sultan in Sumatra.
Sent 11: Islam won its place in Malaya not by conquestas had been the case in North Africa and Europebut by trade, dynastic alliances, and peaceful preaching.
Sent 12: Bengali peddlers had already brought the faith to the east coast.
Sent 13: In Melaka and throughout the peninsula, Islam thrived as a strong, male-dominated religion of individuality, offering dynamic leadership and preaching brotherhood and self-relianceall qualities ideally suited to the coastal trade.
Sent 14: At the same time, Sufi mystics synthesized Islamic teaching with local Malay traditions of animistic magic and charisma, though Islam did not become the state religion until Muzaffar Shah became sultan of Melaka (14461459).
Sent 15: But the key figure in the sultanate was Tun Perak, bendahara (prime minister) and military commander.
Sent 16: He expanded Melaka's power along the west coast and down to Singapore and the neighboring Bintan islands.
Sent 17: He also had orang laut pirates patrolling the seas to extort tribute from passing ships.
Sent 18: After Ailied district chiefs had repelled assaults from Thai-controlled armies from Pahang, Tun Perak personally led a famous victory over a Thai fleet off Batu Pahat in 1456.
Question: Who expanded Melaka's power to Singapore?.
[A]: Tun Perak.

[Q]: Paragraph- Sent 1: Earths magnetic field helps protect Earth and its organisms.
Sent 2: It protects us from harmful particles given off by the sun.
Sent 3: Most of the particles are attracted to the north and south magnetic poles.
Sent 4: This is where Earths magnetic field is strongest.
Sent 5: This is also where relatively few organisms live.
Sent 6: Another benefit of Earths magnetic field is its use for navigation.
Sent 7: People use compasses to detect Earths magnetic north pole.
Sent 8: Knowing this helps them tell direction.
Sent 9: Many animals have natural 'compasses' that work just as well.
Sent 10: Birds like the garden warbler in Figure 1.36 use Earths magnetic field.
Sent 11: They use it to guide their annual migrations.
Sent 12: Recent research suggests that warblers and other migrating birds have structures in their eyes.
Sent 13: These structures let them see Earths magnetic field as a visual pattern.
Question: What do the structures in a bird's eye allow them to do?.
[A]: The structures in their eyes let them see Earths magnetic field as a visual pattern.

[Q]: Paragraph- Sent 1: We waited for half an hour, watching the smoke curling over the house, and then, judging that the Indians had made off for fear of being ambushed, we crossed the clearing.
Sent 2: It took but a glance to read the story.
Sent 3: The women had been washing by the little brook before the cabin, with the children playing about them, when the Indians had come up and with a single volley killed them all except the child we had heard crying.
Sent 4: They had swooped down upon their victims, torn the scalps from their heads, looted the house, and set fire to it.
Sent 5: We dragged out the body of the woman which had been thrown within, in the hope that a spark of life might yet remain, but she was quite dead.
Sent 6: Beneath the warrior Spiltdorph had shot we found the child.
Sent 7: It was a boy of some six or seven years, and so covered with blood that it seemed it must be dead.
Sent 8: But we stripped it and washed it in the brook, and found no wounds upon it except in the head, where it had been struck with a hatchet before its scalp had been stripped off.
Sent 9: The cold water brought it back to life and it began to cry again, whereat Spiltdorph took off his coat and wrapped it tenderly about it.
Question: Who set fire to and looted the house.
[A]:
The Indians.