Lines 10-21: why is the number of young children" in the present deplorable state of the kingdom a very great additional grievance"? Please someone help me ?

It shows that the state in which poor children live is a social complaint, which exists, even if many do not recognize it.

Explanation:

Swift criticizes Irish society in general, in addition to criticizing the deplorable state of dependence that the country lived. However, he reinforces that in addition to all the social problems that Ireland presents, the condition of poor children is an additional complaint, as these children live in a deplorable way, within a kingdom that is already deplorable. In this case, he claims that the cause of these children is a social agenda, often ignored, but that it is present in society and is visible to everyone.

gregor's attempts to crawl on the walls