\textbf{20--} Which concept is closest to the verse, \textbf{conveying a meaning}?\\
\textit{``If the thorn is like a separation flower''}
\begin{enumerate}
\item[(1)] The union of the rose comes to someone like the bottom of the flame
\item[(2)] My heart keeper will be the union and the soul of the people
\item[(3)] The story of the migrating birds passing by, going away
\item[(4)] And the union stood like a candle and the fire in view
\end{enumerate}