What characteristic allows certain grasses to tolerate light to moderate grazing?

Certain grasses exhibit the ability to tolerate light to moderate grazing primarily due to their capacity for rapid regrowth. This characteristic is attributed to their growth habit, which often includes having an extensive root system and growing points located close to the ground. When grazed, these grasses can quickly rebound by utilizing stored energy in their roots to produce new leaves and stems. This regrowth ability not only allows them to survive grazing pressure but also to thrive in environments where grazing is a natural occurrence.

Other options like the presence of thorns or the production of toxins generally serve different survival strategies and are not typical traits associated with grasses. High leaf density, while beneficial for certain ecological roles, does not directly correlate with the tolerance of grazing. Thus, the feature of rapid regrowth is key to understanding how certain grasses can withstand grazing pressures effectively.