Sri Lanka’s separatist movement involves __Hindus__, who are __Dravidian__ speakers, in the north and __Buddhists__, who are __Indo-Aryan__ speakers, in the south.
Lighter, positively charged particles form at the top of the cloud. Heavier, negatively charged particles sink to the bottom of the cloud. When the positive and negative charges grow large enough, a giant spark - lightning - occurs between the two charges within the cloud. Hope I helped you out :)