Which of the following observations provides the best evidence that intelligence test scores are influenced by heredity?

a: japanese children have higher average intelligence scores than american children.
b: fraternal twins are more similar in their intelligence scores than are ordinary siblings.
c: identical twins raised separately are more similar in their intelligence scores that fraternal twins raised together.
d: the intelligence scores of children are positively correlated with the intelligence scores of their parents.

The correct answer is c) Identical twins raised separately are more similar in their intelligence scores that fraternal twins raised together.

Explanation:

Intelligence is the ability of people to perceive and analyze information and to adapt this information to different environments.

Different investigations have been carried out to determine if intelligence is inherited or influenced by the environment. Still, it has not been proven with certainty; there are indications that inheritance and the environment go hand in hand in terms of intelligence.

For example, in the case of identical twins that were separated, they have more significant similarity in their intelligence scores than fraternal twins, indicating that much of the intelligence is inherited.

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