1. The problem asks us to identify which of the given numbers is an integer. 2. Recall that an integer is a whole number without any fractional or decimal part. Examples include $\ldots, -2, -1, 0, 1, 2, \ldots$. 3. Let's analyze each option: - A: $\frac{1}{5}$ is a fraction less than 1, so it is not an integer. - B: $\frac{5}{6}$ is also a fraction less than 1, so it is not an integer. - C: $5 \frac{1}{6}$ is a mixed number, which equals $5 + \frac{1}{6} = \frac{30}{6} + \frac{1}{6} = \frac{31}{6}$, not an integer. - D: $6$ is a whole number without any fractional part, so it is an integer. 4. Therefore, the only integer among the options is $6$ (option D).