In each case, the measurement is repeated below. Explain whether it is an interval or a ratio

Question:

In each case, the measurement is repeated below. Explain whether it is an interval or a ratio variable.
a. The number of floors in a building.
b. The height of a building measured as precisely as possible.
c. The number of words in a book
d. The weight of a book.
e. A person’s IQ.