……. Is a self….. Force .

Explanation

To solve the question, we need to fill in the blanks with the appropriate terms related to forces. The statement is: "_________ is a self-_________ force."

### Step-by-Step Solution:

1. **Identify the Type of Force**:
- We need to determine which force is described as self-adjusting. In physics, the term "self-adjusting force" typically refers to a force that changes in response to the applied force but does not exceed a certain maximum value.

2. **Recognize the Relevant Force**:
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