
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the ellipse $\frac{x^{2}}{a^{2}} + \frac{y^{2}}{b^{2}} = 1 (a > b > 0)$ with left and right foci $F\_1$ and $F\_2$, respectively. Let $P$ be a point on the ellipse such that $PF\_1 \perp F\_1F\_2$ and $\angle F\_1PF\_2 = 60^\circ$. Determine the eccentricity of the ellipse.

A) $\frac{1}{3}$
B) $\frac{\sqrt{3}}{3}$
C) $\frac{1}{2}$
D) $\frac{\sqrt{3}}{2}$

Present the answer in LaTex format: \boxed{Your answer}
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