Question

a food handlers uniform or clothing may directly or indirectly contaminate food. the most likely reason for this is: it is not light - coloured it is uncomfortable it becomes dirty and is often touched by hands

Explanation:

Food handlers' uniforms or clothing can get dirty from various sources (e.g., handling raw ingredients, being in a food - preparation environment). If they are dirty and hands touch them (which is common as hands move around during work), the dirt (which may contain contaminants like bacteria) can be transferred to food either directly (if hands then touch food) or indirectly (if the dirty part of the uniform touches food - contact surfaces which then touch food). The color of the uniform (light - colored or not) has no relation to contamination. Discomfort of the uniform also does not cause contamination.

Answer:

It becomes dirty and is often touched by hands.