A

 

Account For:(transitive) To explain by relating circumstances; to show that some one, thing or members of a group are present or have been processed.

         I don't have to account for anything to you.


Act out :To perform a role or behavior 

                       The students acted out a scene from the play.    
                                           
Act up :
To behave inappropriately or malfunction 
            The computer started to act up and froze. 

Arm in arm :With arms linked together; with arms around each other's shoulder or waist. (of two or more people)
Synonyms: arm in crook
        Husband and wife were walking arm in arm on the road. 
                                   
Ask for :To request or invite someone to do something .
                     I'm going to ask for help with this difficult task.    

Ask out : ask Someone to go on a date