This can either be Louis Thurstone's Primary Mental Abilities or Howard Gardner's Multiple Intelligence. Both can support this premise because it illustrates that intelligence is not general unlike the theory proposed by Charles Spearman. In Thurstone's and Gardner's theories, a person can e intelligent in one aspect and not on another. This is because there are multiple areas of intelligence and it is not rarely possible for a person to excel in every area.
Salinization is the increase of salt content in soil which will often hinder farmers crops.
Students who study Latin develop an interest in words. They learn something they had never thought of before. ... So, Latin is the next step after phonics because it continues the study of the Latin half of English vocabulary in a systematic, orderly way. Skip the vocabulary courses. Latin was an one of the original medical and law languages.
I hope it helps somehow.