Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Kao (island) - Kao is an island and stratovolcano in Tonga. It reaches 1030 m (3379 ft) above sea level the highest point in Tonga. The date of its last eruption is unknown and fresh lava flows are not seen but the absence of deep erosional gullies or high sea cliffs suggests a very recent origin. It lies about 6 km (3.7 mi) north of Tofua island. The slopes of the island rise at angles exceeding 35 degrees to the summit which has a series of small volcanic craters.
The answer is:
Natural Place