Key(-words) to success – being responsible

To feel responsible for 
To involve important duties
To supervise others / to keep an eye on someone
To make important decisions on behalf of someone else1
To be trusted / trustworthy / reliable / consistent
Deserving to be blamed for something that went wrong
To be the cause of something
To be in charge of someone’s well-being / welfare
It is your job or your duty to deal with
To be in a position of authority over someone
To act correctly
To complete a task satisfactorily