Question

the differences seen within and among species such as fur color, eye color, etc.

evolution

gene flow

frequency

genetic drift

speciation

variation

natural selection

Explanation:

The question is about identifying the term for differences within and among species (like fur/eye color). "Variation" refers to the differences in traits among individuals or species. Other options: evolution is change over time, gene flow is transfer of genes between populations, frequency is about occurrence rate, genetic drift is random change in gene frequencies, speciation is formation of new species, natural selection is differential survival/reproduction. So "variation" matches the description.

Answer:

variation (the option corresponding to "variation")