In the following quotation, what is the meaning of "tooth and nail," and what type of
literary expression is this?
“I would not fight publicly for Atticus, but the family was private ground. I
would fight anyone from a third cousin upwards tooth and nail.” (p. 90)

Excerpt from the trip of a lifetime elizabeth mohn 3 a little more than a week ago, my mother and father started packing our suitcases to prepare for our trip. my entire family woke up early sunday morning, packed the car, and began our expedition to niagara falls. when we reached the american-canadian border, i was excited to enter a foreign country for the first time. the third paragraph is mainly about a) traveling to niagara falls b) leaving the hotel. c) seeing the falls. d) returning home.