Banjaras were significant contributors to the trade and economy during the medieval period of Indian history. Let`s analyze each option:

Option 1: Agriculturists - Banjaras were not generally involved in agriculture. They were traditionally a nomadic tribe moving from place to place, making agricultural activities difficult.

Option 2: Warriors - Although banjaras were a tribe, they were not renowned as warriors. Their primary role was in trade and commerce.

Option 3: Weavers - Weaving was not the main occupation of Banjaras. They might have been involved in small-scale weaving, but it was not their norm.

Option 4: Traders - This is the correct answer. Banjaras were known for being traders. They were engaged in the transportation and trade of goods. They were often referred to as the itinerant traders, who moved in caravans and traded in various commodities like salt, grains, firewood etc. across different regions in Medieval India.