Question

what is natural selection?
a process that selects variations that help 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

Explanation:

Natural selection is a fundamental concept in biology. It is the process where organisms with traits that are advantageous for survival and reproduction are more likely to pass on their genes to the next generation. This leads to the spread of beneficial variations. Option 1 correctly describes natural selection as a process that selects survival - helping variations and spreads them. Option 2 is incorrect because natural selection is not about selecting for extinction. Option 3 is wrong as natural selection does not always cause population size to increase (e.g., in cases of limited resources). Option 4 is incorrect because while mutations cause random variations, natural selection acts on these pre - existing variations.

Answer:

a process that selects variations that help with survival and that spreads the variations to more offspring