Given the sets;
[tex]\begin{gathered} A=\mleft\lbrace\text{spring,summer,winter,autumn}\mright\rbrace \\ B=\mleft\lbrace\text{spring,autumn}\mright\rbrace \end{gathered}[/tex]Note that the elements of set B can be found in set A. Therefore, the following statements are correct;
[tex]\begin{gathered} B\subset A\text{ (B is a }proper\text{ subset of A)} \\ B\subseteq A\text{ (}B\text{ is a subset of or is contained in A)} \end{gathered}[/tex]ANSWER:
[tex]\begin{gathered} B\subset A \\ B\subseteq A \end{gathered}[/tex]