Researchers who have analyzed 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_______________________.

According to the various research that has been conducted on the twins' studies, researchers have suggested that identical twins share the same genetic component and will function in the same manner if get separated. According to research, an individual's IQ is dependent on both the factors i.e, the environmental factors and the genetic factor. However, genetic provides 60% composition whereas the environment provides a 40% composition in an individual's development.

Identical twins show similarity in their genetic component and carry a correlated IQ with each other than fraternal twins and similarly, their IQ will be similar to that of their biological parents rather than the adopted parents because of the genetic composition.

In the question above, the given research results suggest that intelligence has a genetic component.