Here is the passage again:
Deidre has to watch her baby constantly, for Mathew likes to crawl around
the floorboards and pop anything into his mouth. Such as fuzz-covered candies,
dog biscuits, and dead bugs.
You chose to use Punctuation Rule 7 to fix the problem:
Main clause + , + afterthought transition + Ø + details.
The correction looks like this:
Deidre has to watch her baby constantly, for Mathew likes to crawl around
the floorboards and pop anything into his mouth,
such as fuzz-covered candies, dog biscuits, and dead bugs.
Congratulations! You deserve that cyber burger!