Final answer:
The pattern is the repetition of subproblems in a problem-solving process.
Step-by-step explanation:
The pattern being referred to in the question is the pattern of subproblems in a problem-solving process. In this case, at each level, there are a certain number of subproblems, each with a specific size.
For example, let's say we have a problem that can be decomposed into two subproblems, and each subproblem is of size 4. So, the answer would be:
At each level, there are 2 subproblems, each of size 4.