By 7 years of age, children start responding to the stimulus word "dog" with other words like "cat" or "sheep," or responding to the stimulus word "talk" with "run" or "jump." This is evidence that children at this age have begun to .

Catagorize their vocabulary by parts of speech.

Explanation:

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

answer; critical thinking;