Look at the four squares, , , , and , which indicate where the following sentence could be added to the passage. Where would the sentence best fit
It is the only method available for obtaining a variety of colors in bamboo.
For centuries, bamboo has provided building materials for Eastern cultures. Now it is becoming more popular and available in the West, particularly as a substitute for expensive hardwood flooring.
As a flooring material, natural honey-colored bamboo is more stable than carbonized bamboo.
Carbonizing is a technique of steaming and pressurizing the bamboo to introduce carbon fibers that darken the original material.
However, it lowers the hardness factor, the darker bamboo more susceptible to damage.

It is the only method available for obtaining a variety of colors in bamboo.

Look at the four squares,,,, and, which indicate where the following sentence could be added to the passage. Where would the sentence best fit
It is the only method available for obtaining a variety of colors in bamboo.
For centuries, bamboo has provided building materials for Eastern cultures. Now it is becoming more popular and available in the West, particularly as a substitute for expensive hardwood flooring.
As a flooring material, natural honey-colored bamboo is more stable than carbonized bamboo.
Carbonizing is a technique of steaming and pressurizing the bamboo to introduce carbon fibers that darken the original material.
However, it lowers the hardness factor, the darker bamboo more susceptible to damage.