Final answer:
The most common fiber used to make paper is cellulose, a fibrous carbohydrate found in all plants. Cellulose is the structural component of plant cell walls and accounts for over 50% of all the carbon found in the vegetable kingdom.
Step-by-step explanation:
The most common fiber used to make paper is cellulose. Cellulose is a fibrous carbohydrate found in all plants, and it is the structural component of plant cell walls. It is the most abundant of all carbohydrates, accounting for over 50% of all the carbon found in the vegetable kingdom. Cotton fibrils, filter paper, and wood are examples of materials that are predominantly made up of cellulose.