I believe the answer is B, "the government's failure to pass laws restricting logging."
A volcano with an empty magma chamber would be called a caldera
Explanation: During certain types of explosive eruptions, a volcano's magma chamber may empty enough for an area above it to subside, forming a type of larger depression known as a caldera.
<span>Isohalines are lines (or contours) that join points of equal salinity in an aquatic system.</span>
The correct answer is - B. Large sandstone formation in the barren outback of Central Australia.
The Ayers Rock, or Uluru in the native language, is a large sandstone formation in the barren outback in the central part of Australia. This rock is actually one of the trademark natural features of Australia and it is a big tourist attraction, but also a sacred place for the indigenous people of the tribe Pitjantjatjara Anangu. The rock has lot of ancient paintings on it, as well as nice surroundings with lot of springs, waterholes, and rock caves. The Ayers Rock/Uluru is listed as a UNESCO World Heritage Site, and this natural feature is in a national park.
The flow of the Chang Jiang is some 20 times greater than that of the
Huang He. As much of 40% of China's total grain production, 70% of rice
output, and more than 40% of the population are associated with the
Chang Jiang's vast basin that includes more than 3,000 tributaries. With
its numerous tributaries, the Chang Jiang drains nearly 20% of China's
total area. Its upper reaches tap the uplands of the Tibetan Plateau
before sweeping across the enormous and agriculturally productive
Sichuan Basin that supports nearly 10% of China's total population. It
is in the middle course of the Chang Jiang that the controversial Three
Gorges Dam is being constructed.
