Answer
$$\color{blue}{\bf{ 9 }}$$
Work Step by Step
We are given the two functions $\bf{f}$ and $\bf{g}$
$\bf{f(x) = x + 1}$ and $\bf{g(x) = x^2}$
and asked to find $g(f (2))$, read as $g$ of $f$ of $2$
$f(2) = 2 + 1$
$f(2) = \bf{3}$
$g(3) = 3^2$
$g(3) = \bf{9}$
$$\color{blue}{\bf{ 9 }}$$
