Languages are generative. This means that a. they evolve gradually through the generations but retain their original morphological structure
b. a limited number of words can be recombined according to certain rules in order to create an infinite number of sentences
c. they evolve gradually through the generations but retain their original semantic structure
d. they evolve gradually through the generations but retain their original syntactic structure

B

Explanation:

according to hess's theory, when the magma cooled, it would expand and push the tectonic plates apart. it would push the north and south america plates to the west and eurasia and africa ones to the east. the atlantic ocean would get wider but the coastlines of the masses would stay the same.

harry hammond hess was a geologist and a united states navy officer in the second world war. he is considered to be one of the founding fathers of the theory of plate tectonics. he is known for his theories on sea floor spreading, stating that the movement of the continents was the result of see floor spreading. the continents are attached to the plates and do not move separately. the plates themselves shift and change shape, carrying the continents along.

answer; the correct answer to the above statement is to increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mother;