What characterizes the degradation of natural latex cushion foam over time?

The degradation of natural latex cushion foam over time is primarily characterized by its tendency to turn yellow and crumble. This process occurs due to several factors, such as exposure to UV light, oxygen, and heat, which can accelerate the breakdown of the latex material. The yellowing is a visual indicator of this chemical degradation, as the original properties of the latex foam diminish, leading to a loss of structural integrity. As the foam crumbles, it loses its original comfort and support characteristics, making it less effective as a cushioning material.

In contrast to the correct choice, natural latex does not become more durable and flexible over time, nor does it remain unchanged. Its properties tend to decline, resulting in an entirely different set of characteristics, including increased fragility. The idea that it becomes heavier and denser also contradicts the nature of material degradation; typically, as latex foam breaks down, it tends to lose its structural consistency and can feel less supportive and fluffy, rather than becoming denser.