LaTeXで表のセル内改行はtabularx環境を使うと楽 Jump2Fin4U

\documentclass[10pt]{article}
\usepackage{tabularx}

\begin{document}
    \begin{table}[tbp]
        \centering
        \caption{Fox and Dog}
        \label{tab:dox}
        
        \begin{tabularx}{\linewidth}{|X|X|}
        The quick brown fox jumps over a lazy dog. The quick brown fox jumps over the lazy dog. &  The quick brown dog jumps over a lazy fox. \\
        \end{tabularx}
    \end{table}
\end{document}