balance. every animal synchronised into an equation creating a sustainable habitat thriving in its survival.  without the lion the savannah is a desert. all flora and fauna trampled and eaten. etc etc. of course the zebra and deer help it as well helping pollinate and soil enrichment droppings carried into the ground with seeds, insects eat dung bird eat insect, they eat growth back etc etc. they all play roles. meddling extinction occurs.
United Kingdom