The palms of the hands are assumed to be facing forward; arms are at the side.
A. The sun, because there has been theory’s of the sun being able to heat earth from there being a lot of iron in the middle of earth.
Just last year it was 409.8
According to the research, the correct option is A, population genetics is the study of how allele frequencies in a population change over time.
<h3>What is population genetics?</h3>
It studies the origin, amount and distribution of genetic variability present in populations.
It explains the variation between individuals, as well as the dynamics of alleles and genotypes within and between populations.
Therefore, we can conclude that according to the research, the correct option is A, population genetics is the study of how allele frequencies in a population change over time.
Learn more about population genetics here: brainly.com/question/13049509
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