The phrase "to answer the challenge" means to respond or take action in a situation that is difficult or requires effort, skill, or determination. Full definition
They've done this so they can just make up anything they want about him to answer challenging questions about him. (religion.blogs.cnn.com)
Our designers answered the challenge with a mix of wide and narrow lines for a relaxing effect on this comfortable linen - blend bedding. (potterybarn.com)
Here are some of factors to keep in mind, all intended to answer the challenge of how to get promoted. (distinctiveweb.com)