Food, water, and shelter for the individual. For the species, add reproduction.
No. If they are necessary for survival, then they are needs.
Anything people consume beyond what is necessary for survival? The answer is [Want]
No. If they are necessary for survival, then they are needs.
Imperialists believed that colonies were necessary for their health and survival.
Out of the 100 elements in existence, only water and oxygen are necessary for survival.
Oxygen
yes
colors
It is necessary for species survival as a whole. Although reproduction generates an individual, the individual's own reproductive system is not necessary for its survival; although loss or damage to the organs may have deleterious effects beyond loss of breeding ability.
Warmth (shelter)
reproduction
Reproduction is a necessary life function that is not needed for individual survival, as an organism can survive without reproducing.