I believe the answer is B.
Answer:
Fossil fuel firms clearly play a major role in the climate problem.
Allele frequency is a measure of the relative frequency of an allele on a genetic locus in a population.
Usually it is expressed as a proportion or a percentage.
In population genetics, allele frequencies show the genetic diversity of a species population or equivalently the richness of its gene pool.
The frequencies of all the alleles of a given gene often are graphed together as an allele frequency distribution histogram.
Population genetics studies the different "forces" that might lead to changes in the distribution and frequencies of alleles - in other words, to evolution.
Besides selection, these forces include genetic drift, mutation and migration.
The meaning of diffusion is the movement of the molecules reign from high concentration to a low concentration reign. As a result, there is a random motion between the atoms and molecules.
Hope this helps :)
