Answer:
It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible.
Step-by-step explanation:
Synthetic polymers are made up of long chains of atoms, arranged in repeating units, often much longer than those found in nature. It is the length of these chains, and the patterns in which they are arrayed, that make polymers strong, lightweight, and flexible. In other words, it's what makes them so plastic.