responsible
/rɪˈspɑːnsəbəl/
adjective
used to describe the person or thing that causes something to happen
usually + for
having the job or duty of dealing with or taking care of something or someone - + for
[more ~; most ~] :able to be trusted to do what is right or to do the things that are expected or required
[more ~; most ~] :involving important duties, decisions, etc., that you are trusted to do
working under the direction and authority of a particular person - + to