Symmetry phenomenon is everywhere, please observe the following four figures, they reflect the traditional culture of the Chinese people, which, can be regarded as axial symmetry figures

Test analysis: According to the definition of axisymmetric figures, after folding along a certain straight line, the parts on both sides of the line can overlap with each other, the four figures of Options A, B, C, and D are folded along the middle of the vertical line. Folding, the left and right parts can be completely overlap, so A, B, C, D four graphics are consistent with the meaning of the question, so choose D.