Answer
The quark combination $uus$ can produce $\Sigma^+$
Work Step by Step
The $\Sigma^+$ has strangeness $-1$
The up quark $u$ has strangeness $0$
The strange quark $s$ has strangeness $-1$
The net strangeness of $uus$ is $-1$
The $\Sigma^+$ has charge $+1$
The up quark $u$ has charge $+\frac{2}{3}$
The strange quark $s$ has charge $-\frac{1}{3}$
The net charge of $uus$ is $+1$
The $\Sigma^+$ has spin $\frac{1}{2}$
The up quark $u$ has spin $\frac{1}{2}$
The strange quark $s$ has spin $\frac{1}{2}$
If one quark has the orientation of $-\frac{1}{2}$, then the net spin of $uus$ could be $\frac{1}{2}$
Therefore, the quark combination $uus$ can produce $\Sigma^+$
