Task 4
题目
vigilance 只有一只动物的时候他花在观察predator的时间长,觅食的东西就少,一群动物的话就可以找到更多吃的,举的例子是一种黑色猴子
Vigilance refers to the ability to maintain attention and alertness over prolonged periods of time. The professor talks about a kind of black monkey. If there’s only one monkey, it would spend a lot of time observing the predators and much less time finding food; if there are a whole bunch of monkeys, then they would find more food to survive.