Answer:
Question 1 - A parcel of vacant land located at the intersection of two streets used heavily by commuters
The parcel of vacant land could be used for building a house for domestic purposes: to be inhabited by a family or any other group of people, or it could also be used for building a commercial property (for example, a convenience shop).
Because the parcel is located at an intersection where there are many commuters, the market will likely determine that a commercial property would be more profitable, since many commuters means many potential customers.
A house, on the other hand, could not be as profitable, because people tend to dislike living in places where there are many people around.