Explanation:

- The relationship between the numbers can be understood as finding the cube root of the first number to get the second number.

- For example, the cube root of 625 is 5.

- For the second pair, the cube root of 2560 is approximately 8.

- Similarly, finding the cube root of 5000 will give us the answer.

- The cube root of 5000 is approximately 17.1.

- None of the options exactly match 17.1, but looking for the closest correct unit number from the given options, 10 is not correct either.