It means that it is impossible to get something for nothing, or the idea that even if something seems free, there is always a cost, no matter how indirect or hidden the cost is.
I believe the answer would be A ^^
<span>A. The snowflake seems uncertain and hesitant.</span>
The theme of the story is that you need to take time and effort on doing things right because soon it will pay off. When we do something, we need to consider the effects of our decision on the future. Some pigs compromised on time and the materials of their houses hence the quality and their safety were also compromised.