Select from:
I. fighting
II. Quality of life
III. sound
IV. Maintain a species
V. Most plants
VI. entropy
VII. agriculture
VIII. spread flower seeds

Fact 1: Reproduction is the process by which organisms give rise to offspring. Fact 2: Darwin's theory of evolution depends on more offspring than are needed to maintain the species. Given the two facts above, what is reproduction needed for?
Answer:
IV.