Determine which details are facts and which are opinions. Write the letter of each detail in the matching column. Topic Sentence: The World's Fair was held in Chicago in 1893. 

a. The World's Fair was also known as the Columbian Exposition. 

b. The Ferris wheel was introduced at the fair. - 

c. The fair was far superior to the one held in France several years earlier. 

d. People who attended felt it was beyond compare. 

e. There were more than 25,000,000 admissions to the fair. 

f. The fair's midway was noisy and distracting Topic Sentence: 

The design of zoos has changed greatly in the past 100 years. 

a. Many zoos have designed natural habitat exhibits for their animals. 

b. Children enjoy zoos more than adults. 

c. Natural habitat zoos are more interesting to visit. 

d. Some people protested keeping animals in cages. 

e. Zoos have saved some animals from extinction. 

f. In the past, animals were displayed in cages