This is my homework and my teacher said that we need to correct the incorrect sentence. But I don't know why the sentence is incorrect.
Could someone help me ?

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The correct answers are:
“My country, which is located in South America, has many mountains”
“There is a lot of traffic on this street”
“Is it easy for people in this country to buy a car?”
“All I can do now is wait for the results of the examination”
“There is no place like home”
“This pen doesn’t work too well. I’ll try another one”
“My brother and I are going to the ball game tonight”
“People from other countries like to live in New York”
“The subject I liked the best in school was English”

They seem to replace “there” to “it” since “it” is referring to an object not a place, and added words that weren’t necessary