What is the significance of Siddhartha Gautama to Buddhism?

a)An important Hindu, he taught that self-denial is the best spiritual path.
b)An important Indian king, he supported the spread of Buddhism.
c)Known as a missionary, he spread Buddhism to Japan and Korea.
d)Known as the Buddha, his teachings provided the basis of Buddhism.

d) Known as the Buddha, his teachings provided the basis of Buddhism.

Siddhartha Gautama, also known as the Buddha, is the central figure in Buddhism. He is believed to have achieved enlightenment and gained deeper insights into the nature of suffering and the path to liberation. His teachings, known as the Four Noble Truths and the Eightfold Path, form the foundation of Buddhism. Buddhists revere him as a teacher and guide who showed the way to attain enlightenment and end the cycle of birth, death, and rebirth.