Identical twins have iq correlations around .7 to .8, whereas fraternal twins have iq correlations of about .3 to .4. what do these correlations suggest?

Twins studies show identical twin correlations of .7-.8, fraternal of .3-.4 which means high levels of environmental deprivations may swam out effects of genes. In other words, if two twins in an identical pair incline to have closer IQ's than two twins in a fraternal pair, then genetic factor perhaps play a role in IQ. And the correlation between the identical closer. Therefore, identical twins are certainly more possible to have the similar IQ than are fraternal twins.

the answer would be c. sediment buildup on continental slope

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