What part of speech is invalidates?

Read the following excerpt from life on the mississippi by mark twain. no girl could withstand his charms. he "cut out" every boy in the village. when his boat blew up at last, it diffused a tranquil contentment among us such as we had not known for months. but when he came home the next week, alive, renowned, and appeared in church all battered up and bandaged, a shining hero, stared at and wondered over by everybody, it seemed to us that the partiality of providence for an undeserving reptile had reached a point where it was open to criticism. how does twain's use of understatement serve his purpose? be sure to use specific details from the text to support your answer.

Throughout the memoir, the prisoners are made equal in the way they are treated, and again, eliezer sees their equality in another way. how does he describe the equality?

What is your interpretation of “the story of my experiments with turth”?