Step 1: Understanding the Concept:
The question asks to list two key features of the Indus Valley Civilization (also known as the Harappan Civilization).
Step 2: Detailed Explanation:
Two prominent characteristics of the Indus Valley Civilization are:
\begin{enumerate}[label=\arabic*.]
\item Systematic Urban Planning: The cities of the Indus Valley, such as Mohenjo-Daro and Harappa, were remarkably well-planned. They featured a grid-like pattern for streets, which intersected at right angles. The cities were often divided into two parts: a raised citadel area (likely for rulers and public buildings) and a lower town (for the general populace). Houses were built with standardized, baked bricks.
\item Advanced Drainage and Sanitation System: This civilization had one of the world's first and most sophisticated urban sanitation systems. Almost every house had a private bathroom and was connected to a covered drainage network that ran along the streets. These drains had manholes for cleaning and maintenance, showing a strong emphasis on public health and hygiene that was unparalleled in the ancient world.
\end{enumerate}
Other notable characteristics include a standardized system of weights and measures, a unique (and still undeciphered) script, distinctive pottery, and extensive trade networks.
Step 3: Final Answer:
Two key characteristics are its sophisticated urban planning with a grid-like street layout and its advanced drainage and sanitation system.
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