The correct answer is option 'B', Jataka tales.

Jataka tales are a collection of stories that recount the previous lives of the Buddha before he was born as Prince Siddhartha Gautama. These tales are an integral part of Buddhist literature and provide moral lessons and teachings. Let's delve into these stories and understand their significance.

1. What are Jataka Tales?
Jataka Tales are a compilation of stories that depict the previous lives of the Buddha. According to Buddhist tradition, the Buddha had taken countless rebirths before attaining enlightenment. Each tale narrates the Buddha's past lives and highlights moral values and virtues.

2. Significance of Jataka Tales:
- Illustrating Buddhist Teachings: Jataka Tales serve as a medium to convey the teachings of Buddhism. Each story embodies a moral lesson, emphasizing virtues like kindness, compassion, generosity, and selflessness.
- Inspiration for Practitioners: The Jataka Tales inspire and guide Buddhists in their spiritual journey. They provide examples of how individuals can cultivate positive qualities and overcome challenges.
- Depicting the Buddha's Progress: These tales reflect the Buddha's journey towards enlightenment. They demonstrate his gradual development of virtues and the accumulation of merits in his previous lives.
- Encouraging Good Deeds: Jataka Tales encourage individuals to engage in good deeds and live a virtuous life. They emphasize the importance of ethical conduct and its impact on one's future rebirths.

3. Stories of Buddha's Birth and Previous Lives:
Jataka Tales contain various stories related to the Buddha's birth and his previous lives. Some notable examples include:
- The Bodhisatta's Birth: This story describes the birth of Prince Siddhartha Gautama as the Bodhisatta, the future Buddha, in the Tusita heaven.
- Vessantara Jataka: This tale recounts the life of Prince Vessantara, one of the Buddha's previous lives. It tells the story of his selfless act of giving away his cherished possessions, including his children, to help others.
- Sutasoma Jataka: This story revolves around Prince Sutasoma, who renounces his kingdom to become a monk. It teaches the importance of detachment and spiritual liberation.

In conclusion, Jataka Tales are a collection of stories that depict the previous lives of the Buddha. These tales serve as a means of conveying moral teachings and inspiring individuals to cultivate positive qualities. They are an integral part of Buddhist literature and provide valuable insights into the Buddha's journey towards enlightenment.