This nation has given australia its greatest economic boost through its purchase of australia's natural gas. united states china japan new zealand

Australia is known to have large resources of coal, uranium and natural gas, where oil, gas and energy industries are the major contributors in their economy.  Australia's petroleum industry has contributed $6.2 billion per annum to their GDP.

In terms of its petroleum industry, the Liquid Natural Gas (LNG) is the fastest growing energy sector that promises continued growth. This is because Australia is the world's fifth largest exporter of LNG, where Japan is considered to be the primary importer. Likewise, Japan is also Australia's top export market for coal.

In a right-angled triangle: 1- the hypotenuse is the longest side2- we can apply pythagorean rule which states that: (hypotenuse)^2 = (side1)^2 + (side2)^2for the given triangle,longest side is 15 cm  side1 = 9 cmside2 is 12 cm  to check whether the triangle is right-angled or not,compare (15)^2 to the summation of (9)^2 and (12)^in other words, compare 225 to the summation of 81 and 144if they are both equal, then the triangle is right-angles, otherwise, it is not.you haven't provided the diagram showing her work, so i cannot tell the choice. however, apply my explanation to the question you have.