To describe the end behavior of the function \( y = \log x \):
- As \( x \to 0^+ \) (approaching zero from the right), \( y \to -\infty \).
- As \( x \to \infty \), \( y \to \infty \).
So the correct description is:
As \( x \to 0^+ \), \( y \to -\infty \), and as \( x \to \infty \), \( y \to \infty \).
This corresponds to the following response:
As \( x \to 0^+ \), \( y \to -\infty \), and as \( x \to \infty \), \( y \to \infty \).