state whether true or false? {a} belongs to { a,b,c} pls explain your answer.

{a} is the set which contains one element a.
but the set {a,b,c} has three elements a,b and c.
$a\in \{a,b,c\}$
but $\left\{a\right\}\notin \{a,b,c\}$

hope this helps you