Read paragraph 3 in the text.
Gafni set to work. He decided to build a cardboard bicycle on his own. The biggest difficulty was creating cardboard that would be strong enough to hold the weight of a person. He discovered the solution to this problem by thinking about Japanese origami. In origami, paper is folded to create different shapes. Gafni realized that these folds made the paper stronger. When he used folded cardboard, he could triple the amount of weight the cardboard could bear. He tested the folded cardboard under cars and cinder blocks to be sure it would work. Next, he created a coating for the bike that would make it weather resistant. Eventually, the bikes were painted with acrylic paints mixed with add-ons that sealed and enhanced them.
What does this paragraph help the reader understand? Select TWO correct answers