Read the passage and answer the question.

Everything in nature follows a pattern. Circles, lines, spirals, and angles are repeated to make a design or a pattern. Patterns in nature are not just pretty adornments. They serve a purpose that has helped nature survive and flourish.

Have you ever taken a close look at a beehive? Well, not too close or you might get stung! The natural pattern in beehives is so perfect that it seems to be computer designed. The hives are made up of layers and layers of cells. Each cell has six perfectly equal sides or hexagons. Why would bees build six-sided cells, instead of round, or box shaped ones? The reason is that the bee is a genius at geometry and architecture! Six-sided cells use up every bit of space and allow bees to get the maximum area for storing honey. Also, Hexagons use the least honeycomb wax because all six sides are identical in length. The bees don’t waste space, material, or effort. Aren’t they smart insects?

What is the main idea of the selection?