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.
1. enrichment-act of making fuller or more meaningful or rewarding. improvement-the act of improving something; their improvements increased the value of the property. fortification-the addition of an ingredient for the purpose of enrichment (as the addition of alcohol to wine or the addition of vitamins to food).