Final answer:
The level of difference in the given sequence 0, 12, 10, 0, -12, -20 is the second (c) level.
Step-by-step explanation:
The given sequence is: 0, 12, 10, 0, -12, -20. The level of difference in the given sequence 0, 12, 10, 0, -12, -20 is the second (c) level. To determine the level of difference, we need to find the pattern between the terms.
The difference between the first and second terms is 12, the difference between the second and third terms is -2, the difference between the third and fourth terms is -10, and so on. So, the level of difference is changing after every two terms. Therefore, the level of difference is second (c).