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.
While job enlargement is considered as horizontal restructuring method, job enrichment is considered as vertical restructuring method of moral excellence of giving the employee additional authority, autonomy, and control over the way the job is accomplished. Also called job enhancement or vertical job expansion.