A fox can hop on - - log (a, an)

A fox can hop on a log

Explanation:

The reason that it is "a" is because the beginning of log doesn't sound like a vowel. In order for it to be "an" the word right after it has to sound like it starts with a vowel.

It doesn't have to start in a vowel, it has to start with the sound of a vowel first it to be "an"

It's A because that the best way to say it and I did research