The chart data gives information about underground rail networks in six major cities.
The chart compared in terms of their age, their size and the number of 
people
 who use them every year. Use synonyms
It is clear that
 the three oldest Linking Words
railroad
 systems are larger and Use synonyms
serves
 more Correct subject-verb agreement
serve
people
 than the newer cities.
London Use synonyms
railroad
 network is the oldest Use synonyms
system
, Use synonyms
have 
built in 1863. It is Unnecessary verb
apply
also
 the largest Linking Words
railroad
 Use synonyms
system
, with 394 Use synonyms
kilometres
 of route. The second largest Use synonyms
system
 is in Paris, it is only about Use synonyms
the 
half of London’s, with 199 Correct article usage
apply
kilometres
 of route. Use synonyms
However
, it serves more passengers every year. Tokyo’s Linking Words
railroad
 Use synonyms
system
 is in third of them, but it serves the most Use synonyms
people
 Use synonyms
use
 it, with 1927 million Correct pronoun usage
who use
people
.  
Of the three newer Use synonyms
railroad
 networks, Washington Use synonyms
Dc
 has the largest one, with 126 Correct your spelling
DC
kilometres
 of route, Use synonyms
while
 Kyoto and Los Angeles only have 11 Linking Words
kilometres
 and 28 Use synonyms
kilometres
. Los Angeles’ Use synonyms
railroad
 is the newest Use synonyms
railroad
 Use synonyms
system
, Use synonyms
have
 Verb problem
was
build
 in 2001. Change the verb form
built
By contrast
, Kyoto has the smallest Linking Words
railroad
 network, only Use synonyms
serves
 4500 million passengers per year.Wrong verb form
serving