The sentence that best explains the phrase "survival of the fittest" the individuals that are the healthiest will always get more resources and survive better.
Evolution by Natural selection
The theory of evolution was proposed by the scientist, Charles Darwin. He proposed that species can change over time, that new species come from pre-existing species, and that all species share a common ancestor.
Natural selection according to Charles Darwin was based on the fact that traits where inheritable. From his experiment, he concluded that:
- some individuals will have inherited traits that help them survive and reproduce,
- organisms with these traits leave more offspring, the traits will tend to become more common in the next generation.
- These organisms with these helpful traits will become better adapted to it's environment.
Therefore, the individuals that are the healthiest will always get more resources and survive better.
Learn more about natural selection here:
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