Answer:
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A very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.
The two system that is being described above is the nervous
system and endocrine system for they are the ones who are responsible in
providing the body long distance coordination with the use of homeostasis and
their role of maintaining it, in order to play their roles in the body.
Hihi!
The answer would be 2) Plenty of food! If you have plenty of food then the likely hood for more of the population to live would increase, the rest of the causes would cause decrease in the population!
I hope I helped!
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