Step 1: Meaning.
Social stratification refers to structured inequality in society where people are ranked in a hierarchy.
Step 2: Examples.
\begin{itemize}
\item In India, caste system is a form of stratification.
\item In modern societies, class (wealth, income, education) determines stratification.
\end{itemize}
Step 3: Conclusion.
Thus, stratification is a system of ranking people into layers with unequal access to resources and power.
Final Answer: \[ \boxed{\text{Stratification = structured social hierarchy}} \]
Mention the events related to the following historical dates:
\[\begin{array}{rl} \bullet & 321 \,\text{B.C.} \\ \bullet & 1829 \,\text{A.D.} \\ \bullet & 973 \,\text{A.D.} \\ \bullet & 1336 \,\text{A.D.} \\ \bullet & 1605 \,\text{A.D.} \\ \bullet & 1875 \,\text{A.D.} \\ \bullet & 1885 \,\text{A.D.} \\ \bullet & 1907 \,\text{A.D.} \\ \bullet & 1942 \,\text{A.D.} \\ \bullet & 1935 \,\text{A.D.} \end{array}\]