Answer : 3. "Subdued"
Explanation :

Unobtrusive: Not conspicuous or attracting attention.
Subdued: (of a person or their manner) quiet and rather reflective or depressed.
Propitiate: Win or regain the favour of (a god, spirit, or person) by doing something that pleases them.
Erroneous: Wrong; incorrect.
Capitulate: Cease to resist an opponent or an unwelcome demand; yield.