After a star burns up all it's hydrogen, it becomes a red giant.
That would mainly depend on the star's mass.
What are the human and natural causes that are endangering the Giant Panda?
tsunami obviously
A giant star would experience a supernova explosion, in order to become a white dwarf.
landfills are a giant hole filled we rubish
It's actually a giant wave that causes flooding
These waves are called "Tsunami" Note , Earthquakes CAN cause giant waves (not all sub sea earthquakes do this). Note also that there are other causes of Tsunami.
It is a tsunami
It is performed in much the same manner as the Venus Butterfly and causes similar effects.
Hurricanes, which is bascially hot and cold fighting against each creating very strong winds, but that Giant Red Spot is a hurricane about the size of Earth.
The red spot on Jupiter is actually the eye of a giant cyclone [giant meaning it could swallow a large number of objects the size of Earth all at once].
A red giant forms when a star runs out of hydrogen fuel at its core and starts fusing hydrogen in a shell around the core the core. This causes the star to expand and cool.