Which word in the passage can replace the word 'orderliness'?

Directions: Read the following passage to answer the given question.

Mathematics is the language in which the Book of Nature is written: Mathematics is the queen of sciences. It is universally agreed that Mathematics is the backbone of science and technology. For without Mathematics the engineer is but an artist or a sculptor. He can build the bridge, attest to its form and beauty, but without Mathematics he cannot guarantee its reliability to serve the purpose for which it is built. Mathematics is indeed the science of sciences. It is also the art of all arts. It is right, legitimate and defensible to consider Mathematics as an art. The poet, the musician, the artist and the mathematician have a lot in common. Fundamental to all their studies and works is their common interest in the logical study related to concepts and objects to form patterns which will produce beauty, harmony and order. Thus, the poet arranges words to produce a pattern called poetry; the musician arranges sounds to produce a pattern called music; the artist arranges colours to produce a pattern called painting and the mathematician arranges abstract ideas into a pattern, using symbols, to produce equations. Each of these patterns-the poem, the music, the painting and the equation must stand up to the test of the same order, harmony and beauty. So if mathematics is not an art, what is art?