Final answer:
Bhai Bachittar Singh was the Sikh who drove a spear into the elephant's head at the battle of Anandpur. The event is a representation of Sikh bravery in their conflict with the Mughals under Aurangzeb's rule.
Step-by-step explanation:
The name of the Sikh who drove a spear into the elephant's head at the battle of Anandpur is Bhai Bachittar Singh. This battle is one of the historical events that showcase the valor and strategic warfare skills of the Sikhs against the Mughal forces. The Mughals and the Sikhs had several confrontations, one of which was during the rule of Aurangzeb, who executed Sikh Guru Tegh Bahadur, reflecting the persecution of Sikhs under his regime. Sikhism, a religion founded in the Punjab region in the 15th century, is known for its warrior spirit and opposition to India's caste system.