documentclass[margin=5mm]{standalone}
usepackage[utf8]{inputenc}
usepackage[edges]{forest}

begin{document}

begin{forest}
    for tree={
        l sep=1cm,
        child anchor=north,
        parent anchor=south,forked edges,
        edge={->,>=latex}}
    [Circuit Elements
        [Active
        [a
        ]
        [a
        ]
        ]
        [Passive
        [b
        ]
        [b
        ]
        ]
    ]
        end{forest}

    end{document}