Which country has the lowest average height above sea level?
Sorry, but the сorrect answer is:
Maldives, officially the Republic of Maldives, is an island country and archipelago in the Indian Ocean. It lies southwest of India and Sri Lanka. The chain of twenty six atolls stretches from Ihavandhippolhu Atoll to the Addu Atoll. The capital is Malé, traditionally called the "King's Island."
With an average ground-level elevation of 1.5 metres (4 ft 11 in) above sea level, it is the planet's lowest country. It is also the country with the lowest natural highest point in the world, at 2.4 metres (7 ft 10 in).