What is the radical of this kanji?

She remembered her past resentments while singing a song of resentment.

In this town, the clearing out of mud from a ditch is carried out every spring.

He does the job of clearing out mud from a ditch every week.

He acted according to my instructions one by one.

He is carefully doing each and every task.

He solved each problem one by one carefully.

Thank you for cooking for me.

He plays dumb as soon as a problem arises.

He comes home drunk every night.