Sangam literature is Tamil literature.

Introduction:
Sangam literature refers to a collection of ancient Tamil literature composed between 300 BCE and 300 CE. It is considered one of the oldest and most significant works of Tamil literature. The Sangam period was a golden age for Tamil literature, with poets and scholars flourishing under the patronage of various Tamil kings.

Explanation:
1. Origin:
Sangam literature originated in the region of Tamil Nadu, a state in southern India. It was produced by a group of scholars and poets known as the Sangam, who gathered in assemblies (sangams) to discuss and compose literature. These assemblies were supported by kings and rulers, who patronized the development of Tamil literature.

2. Themes and Genres:
Sangam literature covers a wide range of themes and genres, including love, war, ethics, philosophy, and nature. It consists of two main categories: Ettuthokai (Eight Anthologies) and Pattupattu (Ten Idylls). Ettuthokai contains poems of love, heroism, and ethics, while Pattupattu consists of narrative poems celebrating the local chieftains and their valor.

3. Importance:
Sangam literature holds immense historical, cultural, and linguistic significance. It provides valuable insights into the social, political, and economic conditions of ancient Tamil society. The poems portray the lives and experiences of people from different walks of life, including kings, warriors, farmers, and merchants. They also reflect the beliefs and values of the time.

4. Language and Style:
The Sangam literature is written in classical Tamil, which is considered the purest form of the Tamil language. The poems are characterized by their rich imagery, figurative language, and rhythmic patterns. The poets employed various poetic devices such as alliteration, metaphor, and simile to enhance the beauty and impact of their verses.

5. Influence:
Sangam literature has had a profound influence on Tamil culture, literature, and identity. It has shaped the Tamil language, providing it with a strong literary tradition. The themes and ideals expressed in the poems continue to resonate with contemporary Tamil society. The literary techniques and conventions established during the Sangam period have also influenced subsequent generations of Tamil writers.

Conclusion:
In conclusion, Sangam literature is Tamil literature. It is a collection of ancient Tamil poems and texts composed during the Sangam period. The literature originated in Tamil Nadu and covers various themes and genres. It holds immense historical and cultural significance and has shaped the Tamil language and literary tradition.

Sangam literature was at the time of cholas , pandyas and it was celebrated upto 3 to 4 centuries in reign of chola kingdom at madurai . sangam literature IS the main source of information of the tamils so according to this question the specific answer will be tamil literature.