The document discusses two types of symmetry found in nature: bilateral symmetry and rotational symmetry. Bilateral symmetry refers to shapes that can be folded along an imaginary line so that opposite sides match, like many insects and animals. Rotational symmetry involves shapes that look the same when rotated around their central point, exemplified by snowflakes, flowers, and starfish. The document provides examples and images to illustrate these two fundamental forms of symmetry exhibited in the natural world.