Explanation:

- Option 1: too noisy

- This is the correct option.

- "Too noisy" is the standard phrase in English.

- It means the noise level is excessive.

- There’s no need to modify "too" with "much."

- Option 2: much too much noisy

- This option is redundant.

- It uses "much" twice, which is not grammatically correct.

- It doesn't effectively communicate excessive noise.

- Option 3: No substitution

- This option implies the original sentence is correct.

- "Too much noisy" is not proper English.

- The phrase does not follow standard language structure.

- Option 4: much noisy

- This phrase isn't grammatically accurate.

- Some adjectives can be intensified with "much," but "noisy" isn't typically one of them.

- It does not convey the intended level of excessiveness.

The correct answer is: Option 1: too noisy