Question

read the paragraph about famous railway lines from around the world. select the sentence that should be removed to improve the focus of the paragraph. some trains around the world have gained international fame, often for the distance they travel or the terrain they cover. one example is the trans - siberian express in russia. since the early 1900s, this famous train has connected moscow with vladivostok, which is almost six thousand miles away, making it the worlds longest railway line. today, traveling this route via the express is about a six - day journey. in australia, travelers have been taking the ghan railway through the remote outback and across the continent since 1929. this rail line, which began operating in the early twentieth century, traverses much of australia. another example is the qinghai - tibet in china, which is hailed as the worlds highest altitude train line; at one point in its journey, the train reaches an altitude of almost seventeen thousand feet above sea level. due to this extreme elevation, passengers are provided with oxygen masks and pressurized cabins.

Explanation:

The paragraph is about famous railway lines and their notable features like distance or terrain. The sentence "This rail line, which began operating in the early twentieth century, traverses much of Australia." is redundant as it repeats information already given about the Ghan railway starting in 1929 and traversing Australia.

Answer:

This rail line, which began operating in the early twentieth century, traverses much of Australia.