Final answer:
China is the biggest trading partner for both exports and imports for Australia due to geographical proximity, complementary economies, and bilateral trade agreements.
Step-by-step explanation:
In terms of Australia, its biggest trading partner for both exports and imports is China. China is the largest partner for both because of several factors.
Geographical proximity: Australia has a strategic location in the Asia-Pacific region, making it a natural trading partner with China.
Complementary economies: Australia exports raw materials and agricultural products, which are in high demand in China for its manufacturing sector. On the other hand, China exports manufactured goods and consumer products, which are in demand in Australia.
Bilateral trade agreements: Australia and China have negotiated agreements that have facilitated trade between the two countries, including the China-Australia Free Trade Agreement (CHAFTA).