What is the main theme of the book "Teardrop Diplomacy"

A piece of paper is folded and cut as shown below in the question figures from the given answer figures, indicates how it will appear when opened?

How many triangles are there in the given figure?

Select a figure from amongst the Answer Figures.

Select the figure which will come next in the following figure series.

Select a figure from amongst the Answer Figures.

Select the figure that will come next in the following figure series.

Select a figure from amongst the Answer Figures.

Select a figure from amongst the Answer Figures.

Select a suitable figure from the Answer Figures that would replace the question mark (?) from question figure.