The study of the structure of language or how words are combined into meaningful sentences (e. g., the cat white or the white cat) is known as . syntactics
b. semantics
c pragmatics
d. phonetics
e. ethnocentric

A). Syntactics.

Explanation:

Synatactics is exemplified as the study associated to the set of rules that govern the structure of a particular language(also known as syntax) and the manner in which words are arranged or combined together in order to provide significant and meaningful phrases or sentences. Thus, option A becomes the correct answer as the other options correspond to the different branches of study. For Example; 'semantics'(option B) is associated with the 'study of meaning of the words' while 'pragmatics'(option C) relates to 'use of language in a social background/context'. 'Phonetics'(option D) is associated with the 'study of physical sounds(phones) of human speech' and 'Ethnocentric'(option E) implies 'perceiving the world through one's own cultural (ethnic/traditional) perspective. Therefore, option A becomes the most correct and appropriate answer to the given question.  

i don't see any questions on your profile, currently, but i'd be happy to try and with any problems that you have, so long as i understand the problem myself.

the italian poet francesco petrarch did! (: