Explanation: Keezhadi, located in Tamil Nadu, has emerged as a significant archaeological site in recent times due to its major excavations that have shed light on the early Tamil civilization. The excavations at Keezhadi began in 2015 and have continued to uncover a wealth of artifacts and structures that date back to the Sangam period, which is believed to have spanned from the 3rd century BCE to the 3rd century CE.
The site has revealed evidence of a well-organized urban settlement, including pottery, beads, and other artifacts that suggest a sophisticated society. The findings at Keezhadi have challenged earlier perceptions of the timeline of Tamil civilization, providing evidence that urbanization and cultural development in the region were more advanced and earlier than previously thought.
Keezhadi's significance lies in its contribution to our understanding of the early Tamil society, its trade networks, and its cultural and economic activities. The excavations have unearthed a variety of materials that indicate the site was a hub of trade and commerce, with connections to other parts of India and possibly beyond.
In contrast, the other options listed do not fit the context of recent major excavations. Hampi, Karnataka, is known for its ancient ruins and temples from the Vijayanagara Empire, but it is not associated with recent excavations. Jaisalmer Fort, Rajasthan, is a historical monument with significant cultural and architectural importance, but it is not a site of recent archaeological excavations. Lothal, Gujarat, is an important site from the Indus Valley Civilization, but it is not known for recent excavations.
Therefore, Keezhadi, Tamil Nadu, stands out as the correct answer due to its recent and significant archaeological findings that have contributed to our understanding of early Tamil civilization.