The correct description of the end behavior of the function \( y = \log x \) is:
As \( x \to 0^+ \), \( y \to -\infty \), and as \( x \to \infty \), \( y \to \infty \).
This means that as \( x \) approaches 0 from the positive side, the value of \( y \) decreases without bound (approaching negative infinity), and as \( x \) increases towards positive infinity, the value of \( y \) also increases without bound (approaching positive infinity).