John Rolfe significantly contributed to the Virginia tobacco industry by introducing a new strain of tobacco that was more profitable in the European market. He brought seeds of Nicotiana tabacum from the West Indies and cultivated it successfully in Virginia. This new strain proved to be of higher quality than the indigenous varieties, leading to increased exports and establishing tobacco as a dominant cash crop in the colony. His introduction of this new type of tobacco was pivotal in transforming Virginia's economy and proving the viability of the colony.
So, the correct answer is: He introduced a new kind of tobacco to Virginia.