a photograph of oneself, a photographic self-portrait / (especially) a selfie

to take a photograph of oneself, to take a selfie

talking about oneself (especially, when the audience is not interested)

soul-searching

one's own concern or problem

(idiomatic) selfishness, self-centeredness

constituency - (a district represented by an elected official; the voters of such a district)

(politics) an election held when the term for a member of the house ends or when the Diet is dissolved; a general election

voting system

suffrage