3. Both Hindus and Buddhists believe in the cycle of birth, death and rebirth of the spirit called

Saṃsāra is a Sanskrit word that means "wandering" or "world", with the connotation of cyclic, circuitous change. It is also the concept of rebirth and "cyclicality of all life, matter, existence", a fundamental belief of most Indian religions. In short, it is the cycle of death and rebirth.

Isay b but i'm not sure.