Where do many families live in one big building?

Solution:

The question asks where many families live in one big building. Let's analyze the options:

• A) In a house: Typically, a house is for a single family.
• B) In a flat: A flat (or apartment) is a unit within a larger building, often shared by multiple families.
• C) In a cottage: A cottage is usually a small, single-family dwelling.

Therefore, many families live in one big building in flats.

Answer: B) In a flat