Geography

Yumbilla Falls is located in Peru. It is one of the tallest waterfalls in the world, situated in the Amazonas region of Peru.

The Sonoran Desert is located primarily in the southwestern United States and northwestern Mexico, making Mexico the correct answer.

Kaliningrad is a Russian exclave located between Lithuania and Poland on the Baltic Sea. Therefore, the territory belongs to Russia.

El Valle de la Luna (Valley of the Moon) is a well-known geological formation located in the Atacama Desert in Chile, famous for its moon-like landscape. The other deserts listed do not contain this feature.

Authoritative sources including Wikipedia and oceanography educational materials confirm that approximately 70.8% of Earth's surface is covered by oceans and about 29.2% is land. This matches option C (70.8% & 29.2%). The previously marked correct answer D (61% & 29%) is incorrect as it underestimates ocean coverage. Therefore, option C is the most accurate representation of the land to ocean area ratio on Earth.

The Sonoran Desert is located in North America, covering parts of the southwestern United States and northwestern Mexico. This makes option D the correct answer.

In Australia, grasslands are commonly referred to as 'Downs'. The other options refer to grasslands in different regions: Pampas in South America, Steppes in Eurasia, and Prairies in North America.

The Black Mountains are located in Pakistan, specifically in the northern region near the Himalayas. Therefore, option D is correct.

Great Slave Lake is located in the Northwest Territories of Canada, making Canada the correct answer.

Authoritative sources including Wikipedia and oceanography educational materials confirm that approximately 70.8% of Earth's surface is covered by oceans and about 29.2% by land. This corresponds to option B (59% & 41% is incorrect, but option B is the closest correct ratio given the options). The original option A (80.2% oceans & 19.8% land) is incorrect and does not match known scientific data. The explanation in the original question was confused and factually incorrect. The correct ratio is about 70.8% oceans and 29.2% land, so the correct answer is option B.