Final answer:
The correct answer to which number is an integer but not a whole number is B. -4, because it is a negative integer which excludes it from being a whole number.
Step-by-step explanation:
The question asks which of the following is an integer but not a whole number. Integers are numbers without any fractional or decimal parts and include negative numbers, zero, and positive numbers. Whole numbers are all non-negative integers, which includes zero and all positive integers, but not negative integers.
Let's review the options:
- A. -9.6 is not an integer because it is decimal.
- B. -4 is an integer (because it is a whole number without a fractional part) and it is not a whole number (because it is negative).
- C. 0 is both an integer and a whole number.
- D. 3.7 is not an integer because it is a decimal.
Therefore, the correct answer is B. -4.