Survival is dependent upon procreation
Parasitic.
you need to know each of these choices meaning so that it will be easier to solve such a problem.
parasitic means it consumes its host and leave it only exhausted adn maybe dead.
autotrophic is like plants, they can make their own food.
saprophytic means is called on an organism, especially fungi, that feeds on dead material only.
Answer:
They serve us as shelters.
It protects us from many natural hazards like, rain,heat etc.
It provides a privacy to every person.