Research suggests that levels of the female hormone estrogen are correlated with performance on verbal tasks and correlated with performance on spatial tasks

The research shows that the relationship between estrogen and verbal tasks is negative while it is positively correlated with spatial tasks. This correlation shows that, like in other animal studies, there could be some sort of organizing of the brain that goes on related to the level of sex hormones in the body.

The answer would be sand and gravel

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes