Vivipary automatically limits the number of offsprings in a litter How ?

Explanation

Vivipary is defined as the seeds germinate while they are still attached to the mother plant, Plants which grows in Marshy places are called Mangrooves. In these plants, seeds when fall on Marshy places, can not germinate because of high salinity and more water conditions. So in those plants, seeds germinate when they are in mother plant to raise their generations. The seeds of Mangrooves can not germinate even on litter because of unfavourable conditions. So the number of offsprings will dicrease.