Here is the original item:
Deidre must watch her baby constantly, for Mathew likes to crawl on the
floor and pop whatever he finds 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 must watch her baby constantly, for Mathew likes to crawl on the
floor and pop whatever he finds 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.