"Welcome to our first class on marine life and its organization!" The professor introduces himself in front of the class "I am Professor Lapras and I'm very proud in being here today" He held a clipboard in one hand and a pen in the other. He clicks the pen a few times and writes something on the clipboard "Today we're gonna learn about food chain and it's organization." You were almost falling asleep but then he points to you with the pen "Hey! Sleepy head! Could you explain me this?"