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.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.