The Terminal Side Of $\theta$ Lies on the Given Line in the Specified Quadrant

The terminal side of $\theta$ lies on the given line in the specified quadrant. Find the value of the given trigonometric function of $\theta$ by finding a point on the line.
$\begin{array} { c c c } \text { Line } & \text { Quadrant } & \text { Evaluate: } \\ 2 x + y = 0 & \text { IV } & \csc \theta \end{array}$

A) $\frac { \sqrt { 5 } } { 2 }$
B) $- \frac { 2 } { \sqrt { 5 } }$
C) $- \frac { \sqrt { 5 } } { 2 }$
D) $\frac { 2 } { \sqrt { 5 } }$
E) $- \frac { 2 } { 1 }$