I tried to put two figures in one row and I found that subfigure package could help me. But code:
\documentclass[11pt, a4paper, draft]{article}
\usepackage{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\begin{document}
\section{Example }
Lorem ipsum
\begin{figure}
\centering
\begin{subfigure}[b]{0.3\textwidth}
\centering
\includegraphics[width=\textwidth]{./2pol-hist}
\caption{A gull}
\end{subfigure}
\begin{subfigure}[b]{0.3\textwidth}
\centering
\includegraphics[width=\textwidth]{./2pol-hist}
\caption{A tiger}
\end{subfigure}
\caption{Pictures}
\end{figure}
\end{document}
reorganize my document, placing figures on the top of page. Why figures aren't below the section, as I specified in latex code?

\usepackage{flafter}If you never want a figure to float out of its section add\usepackage[section]{placeins}– David Carlisle Dec 16 '12 at 21:25figures1 | figures2
more text
Like in: ` \begin{document} \section{Ex} Lorem
\begin{figure}[htb] \centerline{\includegraphics[width=0.5\linewidth]{img}} \caption{caption} \end{figure}
Lorem \end{document}` With one figure it works. In my case, I want two figures in one row. Two figures in row, all placed in order I specified in code. Maybe subfigure in this case is not good solution? I'm quite new in LaTeX and I found that subfigures are recommended way, and another are deprecated.
– Marcin Dec 16 '12 at 21:52