Answer:
The correct answer is - natural selection.
Explanation:
The change of an allele's frequency or microevolution in a particular population due to its fitness benefit it provides to the individuals of the population can be caused by the natural selection process. Relative reproductive success is a measure of Fitness.
The change of an allele's frequency in deleterious traits mostly decreases in a population and this process is known as adaptive evolution. There is no or very small number of relative reproductive success present.
I believe the answer is <span>Alcohol
</span><span>Alcohol is one of the most common teratogens. Many mothers don't realize that they are pregnant still consume alcohol until a few weeks of pregnancy. Alcohol has effects on the nervous system and the fetus will keep being susceptible in all three trimesters of pregnancy.
</span><span>Fetal alcohol syndrome includes the low birth weight, low head circumference, and many kinds of symptoms related to nervous system.</span>
Answer:
look left maybe right or out
