Natural selection effects on allele frequencies ( write in your OWN words)

natural selection cause a change in an allele frequencies over time, therefore this increases the likelihood that certain individuals with specific alleles will survive to a reproductive age, enabling them to pass in their alleles to their offspring.

c is the answer to this question. altitude affects the weather because air molecules evaporate.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate