What is natural selection?
a process that selects variations that with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
a process that causes random variations to appear in the offspring of every generation

The correct answer is a process that selects variations that help with survival and that spreads the variations to more offspring.

Explanation:

Natural selection is a phenomenon proposed by Charles Darwin 140 years ago. From its definition the theory of evolution is born.

This process occurs between entities with variation, inheritance and multiplication and the different evolutionary formations that give way to new species through survival and reproduction.

In summary, natural selection is the process of formation of living beings so that they can survive and develop.

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organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.