Final answer:
The correct inequality that compares -6 and 3 is 3 < -6.
Step-by-step explanation:
The correct inequality that compares -6 and 3 is (D) 3 < -6.
To determine the correct inequality, we compare the values of -6 and 3. Since -6 is less than 3, we use the less than symbol (<). The smaller number is always on the left side of the symbol, so the correct inequality is 3 < -6.