Researchers who have analyzed the iq scores of adopted twins have found that identical twins are more like one another in iq than fraternal twins are. they also have found that the iqs of adopted children are more strongly correlated with the iqs of their biological parents than with the iqs of their adoptive parents. these research results suggest

that intelligence has a genetic component.

Explanation:

1.  IQ scores of adopted twins have found that identical twins are more like one another in IQ than fraternal twins

The difference between identical twins and fraternal twins are their genetic composition.

Identical twins shares the exact same genetic composition. While fraternal twins share the same womb before they're born, they do not share the same genetic composition. The fact that  IQ scores of adopted twins have found that identical twins are more alike  indicates that Genetic composition played a big role In IQ.

2. IQs of adopted children are more strongly correlated with the IQs of their biological parents than with the IQs of their adoptive parents.

From this research result we can determine which one the bigger influence of IQ development. (between genetic or environment)

The fact that .IQs of adopted children are more strongly correlated with the IQs of their biological parent indicates that Genetic played a bigger role in IQ development compared to environment where people were raised.

answer; oxygen to the brain;

answer; opportunities to further the healthy development to deal with the crisis of the next stage;