Step 1: Meaning of “savage.”
The word “savage” means wild, uncivilized, or brutal.
Step 2: Analyzing options.
- Ideal: Means perfect or model, not the exact opposite.
- Humble: Means modest, not the opposite of savage.
- Simple: Means plain or easy, unrelated to savage.
- (Civilized: Correct, as it is the direct opposite of wild or uncivilized.
Step 3: Conclusion.
Thus, the antonym of “savage” is “civilized.”
Final Answer:
\[
\boxed{\text{(civilized}}
\]