How to draw the following picture using tikz?

Question

How can I draw the following figure in LaTeX using tikz (if possible)?

How to draw the figure with the fruits replaced by letters or numbers?

Answer 1

Here you go! The matrix of nodes from the matrix library seems to be ideal for that task.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}
  \matrix[matrix of nodes,row sep=1em] (m)
  {
    $S$: & apple  & apple  & apple  & apple  & apple  \\
    $T$: & 1      & 2      & 3      & 4      & 5      \\
    $W$: & banana & banana & banana & banana & banana \\
  };
  \foreach \y in {1,3} {
    \foreach \x in {2,...,6} {
      \draw[<->] (m-\y-\x) -- (m-2-\x);
    }
  }
\end{tikzpicture}
\end{document}