Why do we need to conserve energy?
“Pom! Stop now, hfff . . . hfff . . . I can’t run anymore,” shouted Piu. “Hurray! I won the race,” said Pom. “Hfff . . . hfff! I don’t have the energy to run any more . . . I'm going to rest under the tree,” said Piu. It was getting dark. Soon there was a big moon over the sky. “Piu we have to go home,” said Pom...
