* There is a four-story house on Dongdo.

1. Which story house is this?
- It is a four-story house.

2. How many stories does this house have?
- It has four stories.
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Are the questions and answers correct? Would you correct errors to make natural questions and answers?

1 is incorrect. It should read like this:

How many stories does this house have?
There are four stories in this house.
or
It has four stories.
or
It is a four-story house.

2 is correct.

1 is not correct. 2 is the best way of asking this question.

Yes, the questions and answers are correct. However, to make the questions and answers more natural, you could rephrase them as follows:

1. What is the number of stories in this house?
- This house has four stories.

2. How many floors does this house have?
- It has four floors.