4. Why is it important to not rely solely on visual inspection of a fiber to determine its identity?

Sometimes, it requires years of experience in handling fibers and fabrics to be able to expertly identify the fiber being inspected.

Explanation:

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the answer is d.) potassium