Supergiant Star and Supernovae

How much bigger is the diameter on a super giant than the sun
Several Hundred times
At least 10
50 times
200 times
Other than size what is another criteria for a supe giant star.
Lumosity
Colour
Fuel type
Distance from the sun
What builds in the core before a supernova
Iron
Aluminium
Rock
Lava
Why do the supergiant stars collapes
Gravitational force
Too big
Too bright
Too far away from the sun
How many watts of power does a supernova produce?
380 septilion
840 million
180 Billion
260 trillion
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