Elephants use ecosystems bigger then the National Parks. When they can't access these areas any more they must feed on the farmland causing conflicts. I fear, that in a few years only small numbers of elephants will be left in fenced National Parkes. Lions live in prides of related females with one or several males protecting their territory. They are not fully adult before 3 years and may live up to 30 years.
Lions are masters in saving energy.
The live of lions and lionesses is very different. The females are born in a pride of closely related females and may stay there for the whole life. The males must leave the pride when they grow up. They wander as nomads for a while. When they are at least five years old, then fully grown, they may try to take over a pride where the leading males have got old and weak.