Explanation:

- The highlighted word is "partisan." This usually means showing strong and sometimes unfair support for one person, group, or cause.

- Option 1: Pitiful - Refers to something deserving pity or feeling sadness for, which is not related to having a bias.

- Option 2: Kind - This means being nice and friendly, which doesn't match the essence of partisanship, as kindness doesn't imply bias or strong allegiance.

- Option 3: Biased - This is the most suitable synonym. It means having a prejudice in favor or against something, indicating a lack of neutrality, similar to being partisan.

- Option 4: Destructive - This refers to causing damage or harm. While partisan actions can sometimes be destructive, the word itself doesn’t directly mean partisan.