за своё поведение

for one's behavior

→ за
phrase Rare #36,031
for one's behavior Used when apologizing, feeling ashamed, or being held responsible for someone's own behavior. своё changes according to the subject's gender and number in other forms, but here it is neuter because поведение is neuter.
RU: Мне неловко за своё поведение.
EN: I feel embarrassed about my behavior.