Answer:
supernova
Explanation:
When a high-mass star has no hydrogen left to burn, it expands and becomes a red supergiant. While most stars quietly fade away, the supergiants destroy themselves in a huge explosion, called a supernova. The death of massive stars can trigger the birth of other stars.
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Answer:
the Australian Capital Territory had the highest population density, at 171 people per sq km, followed by Victoria (27), New South Wales (9.7), and Tasmania Explanation:
C. Forests of Southern China.