The question here is one after a lesson discussing the laws of thermodynamics. Within this lesson, you may find the fallowing passage: "According to the first law, an organism can absorb energy from its environment, or it can give up some of its energy to its surroundings. However, the total energy of the organism and its surroundings is always the same. The organism can't create the energy it needs to live. Instead, it must capture it from the environment. Once it captures energy, the organism can use the energy for its own biological work."
Because he wants to know what happened the few days he was gone. For him to catch up with whats been happening he would have to read the newspaper because a history book goes way back. An editorial only talks about that controversial issue and biography won’t tell you the events just tell you about a person. Hope this helps:)