I think that a) is chemical, and b) would be chemical
They are close to the equator, another reason is because of the tropical maritime location, temperature changes throughout the region are generally small.
Indian subcontinent was the source of major religions including Hinduism, Jainism Buddhism and Sikhism. We have listed below the religions with the most followers in order: (1) Christianity: About 2.3 billion followers. About 50% of Christians are Roman Catholics.
