A rock that had magnetic pulses to make things pulverize towards it.
Answer:
One reason in which students might not play sports is because they feel that they are just not good enough to play infront of many people. Some just suffer plain anxiety which comes with mean thoughts towards themselves and just they have little faith in that they can accomplish what they want.
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.