Which of the following best defines gene flow? the sum of all genetic traits in a population’s individuals at a given time any movement of genes from one population to another any movement of organisms from one environment to another the random change in the frequency of an allele in a population

The correct option is this: ANY MOVEMENT OF GENE FROM ONE POPULATION TO ANOTHER.
Gene flow refers to the transfer of genetic data from one population to another population. The gene flow may be high or low. High rate of gene flow can lower genetic differences between two groups of population, thereby increasing homogeneity. Gene flow serves as an important mean of transferring genetic diversity among populations.  

Gene flow is characterized by the flow of different alleles from one genetic population to another. So the best option is "movement of genes from one population to another"

What orders do you have in your chart