Which religion was founded by Siddhartha Gautama and aims to eliminate suffering?

The religion founded by Siddhartha Gautama, who is commonly known as the Buddha, is Buddhism. Buddhism specifically addresses the nature of suffering and offers a path to eliminate it through practices such as meditation, ethical conduct, and wisdom. The core teachings of Buddhism, known as the Four Noble Truths, outline the existence of suffering, its origin, the possibility of cessation, and the path leading to liberation from suffering, termed the Noble Eightfold Path. This focus on understanding and overcoming suffering distinguishes Buddhism from the other religions listed.

Hinduism, which predates Buddhism, incorporates concepts of karma and reincarnation but does not focus explicitly on suffering in the same manner. Christianity is centered around the life and teachings of Jesus Christ, emphasizing salvation and eternal life rather than the systematic analysis of suffering. Shintoism, primarily a Japanese folk religion, revolves around kami (spiritual beings) and does not address suffering in the same conceptual framework as Buddhism. Thus, the correct answer is clearly centered on Buddhism's foundational teachings and goals regarding suffering.