Thinai concept during the Sangam Age is related to which of the following?

Sangam poems help us understand the social formation of the time. According to the Thinai concept, Tamilagam was divided into five landscapes or eco-regions, namely Kurinji, Marutham, Mullai, Neytal and Palai. Each region had distinct characteristics – a presiding deity, people and cultural life according to the environmental conditions, as follows:

– Kurinji: hilly region: hunting and gathering.

– Marutham: riverine tract: agriculture using plough and irrigation.

– Mullai: forested region: pastoralism combined with shifting cultivation

– Neythal: coastal land: fishing and salt making.

– Palai: parched land. Unsuitable for cultivation and hence people took to cattle lifting and robbery.