I do not believe it is possible for long periods of time. If the intestines are still intact, one can live for up to a certain period of time without medical help. However, this is an extremely short period of time.
Hey there! Cellular membrane and cell wall is your answer.
There are a large number of biotic factors from the Lion King introduction, including producers such as trees and grass, consumers such as buck and lions and omnivores such as meerkats.
Red giant or red supergaint (its the same thing)
Its definetly not C or D and B sounds ridiculous so its A.