Take a look at 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 connect the afterthought fragment to the main clause before it, 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.
Unfortunately, you must use a punctuation mark to connect these two parts correctly. Review the rules.
Go back to the sentence to try again.