Which characteristic was found to be the least closely correlated in studies of identical twins reared together versus identical twins reared apart?

Identical twins are “monozygotic” which means they developed from a single fertilized egg that split. The likelihood of identical twins is about 3 in 1,000, almost the same  Identical twins reared apart constitute two individuals with the same genotype (genetic constitution) reared in two different environments. The study of a series of such twins reared apart and reared together showed that influence of genetic and environmental factors on measured characteristics (phenotypes) of the twins is the least closely correlated. 

the correct answer is 2.

a slump in geology means a mass movement process of slope failure. a mass of rock or unconsolidated material drops along a slip surface. in other words, rock layers move a short distance down the slope. the slump block is an intact block (2), without any landslide material.

in this image, 1 is the surface of rapture (scarp), 2 the slump block, 3 main scarp (crown), 4 base of rapture with debris flow.

slumps are caused by clear cutting on unstable soils and the sagging of earth, in coastal areas they are due to wave infiltration.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.