Which question is not answered by the article?

What is one reason why parents are sometimes willing to pay more for sustainable toys?
What is the purpose of creating toys that mimic environmentally sustainable practices?
What is one reason for concern about the safety of plastic toys?
What is the most popular sustainable toy on the market today?

1 answer

The question that is not answered by the article is:

"What is the most popular sustainable toy on the market today?"