Explanation:

- Fatigue means a state of extreme tiredness or exhaustion, often after significant effort or activity. It's both mental and physical weariness.

- Option 1, Strength: This is the capacity to withstand stress or perform well under pressure. It often implies having energy or being invigorated, making it the opposite of fatigue.

- Option 2, Control: Refers to the power to direct or influence. While important, it isn't directly related to energy or exhaustion.

- Option 3, Weakness: This implies a lack of strength or firmness. It shares similarities with fatigue rather than opposing it.

- Option 4, Threat: Indicates a potential danger or harm. It doesn't relate directly to energy levels.

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