Complex sentence: Hinduism, Jainism, Buddhism, and Sikhism all have the idea of "dharma" at their core, where it points to the purification and moral transformation of human beings.
Split into simpler sentences: Hinduism, Jainism, Buddhism, and Sikhism all have the idea of "dharma" at their core. In Buddhism and Hinduism it points to the purification and moral transformation of human beings.