What is the function of cellulose in plants

Cellulose helps make a plant strong and stiff, so it doesn't bend and break. It is in a plants cell walls.

stress fractures occur largely in the feet and legs and are common in sports that require repetitive impact, primarily running/jumping sports such as gymnastics or track and field.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.