Choose the best option to indicate the sentence that is closest in meaning to the sentence given.

Housing is getting more and more expensive in big cities, so many local residents can't afford to buy their own place.
1. Many local residents in big cities can't buy their own place because housing is becoming more expensive every day.
2. More and more local residents can't afford their own place in big cities because housing is too expensive.
3. Housing is getting affordable enough for many local people to buy their own place.
4. Housing in big cities has become the most expensive these days, so many local residents can't afford their own place.
The more people move into big cities, the higher the unemployment is.
1. The higher the unemployment is, the more people move into big cities.
2. More people moving into big cities causes higher unemployment.
3. More people move into big cities despite the high rate of unemployment.
4. More people move into big cities because there are more employment opportunities there.
The more houses are built, the less space we have for plants and trees.
1. Although more houses are built, we still have some space for plants and trees.
2. The fewer houses we build, the less space we have for plants and trees.
3. We have less space for plants and trees because more houses are built.
4. Plants and trees are the reasons why more houses can't be built.