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.
One example: Paragraph- Sent 1: Obama was born on August 4, 1961, at Kapiʻolani Maternity & Gynecological Hospital in Honolulu, Hawaii.
Sent 2: He is the only President to have been born in Hawaii.
Sent 3: He was born to a white mother and a black father.
Sent 4: His mother, Ann Dunham (1942-1995), was born in Wichita, Kansas, of mostly English descent, with some German, Irish, Scottish, Swiss, and Welsh ancestry. Question: How old was Obama's mother when he was born?
Solution is here: 19.
Explanation: Obama was born in 1961. His mother was born in 1942 and 1961-1942=19. Therefore, any of the following responses are considred correct: '19' and 'almost twenty'.

Now, solve this: Paragraph- Sent 1: When land is cleared, habitats are lost.
Sent 2: It may be cleared for agriculture.
Sent 3: It may also be used for building new homes or businesses.
Sent 4: Within the past 100 years, the amount of land used for agriculture has almost doubled.
Sent 5: Land used for grazing cattle has more than doubled.
Sent 6: Many wetlands have also been lost to agriculture.
Sent 7: The U.S. has lost almost all the natural tall-grass prairies.
Sent 8: Thee areas of tall thick grass have virtually disappeared.
Sent 9: These areas of land had thick fertile soil.
Sent 10: Their grasses had very deep root systems.
Sent 11: These deep and thick roots reduced the amount of soil erosion.
Sent 12: They also were home to many plants and animals.
Sent 13: Prairies were wonderful places.
Sent 14: They were home to colorful flowers, prairie dogs, and herds of bison. 
Question: What are the advantages of tall grass prairies?.
Solution:
Less erosion.