Hippos are considered the most dangerous because they are aggressive, they will attack a boat and turn it over. The don't eat people but they are extremely dangerous due to their size. In Africa, the saying goes 'in the bush, an elephant can kill you, a leopard can kill you, and a black mamba can kill you.
Definition: Job Enrichment is the addition to a job of tasks that increase the amount of employee control or responsibility. It is a vertical expansion of the job as opposed to the horizontal expansion of a job, which is called job enlargement.
Task, chore, job, assignment refer to a definite and specific instance or act of work. Task and chore and, to a lesser extent, job often imply work that is tiresome, arduous, or otherwise unpleasant. Task usually refers to a clearly defined piece of work, sometimes of short or limited duration, assigned to or expected of a person: the task of pacifying angry customers; a difficult, time-consuming task.