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.
A job design technique that is a variation on the concept of job enlargement. Job enrichment adds new sources of job satisfaction by increasing the level of responsibility of the employee. Job enrichment is a way to motivate employees by giving them increased responsibility and variety in their jobs.