What conditions are likely to slow down the degradation process of chemicals?

The degradation process of chemicals, including pesticides, is influenced by environmental conditions. In conditions that are cool and dry, several factors contribute to slowing down degradation.

Cool temperatures can reduce the metabolic rates of microbial organisms, which play a significant role in breaking down chemicals. Additionally, dry conditions can limit the availability of moisture, which is essential for microbial activity. Without sufficient moisture, the biochemical processes that facilitate the degradation of chemicals are less efficient.

Therefore, the combination of cool temperatures and dry conditions generally leads to a slower degradation rate of chemicals due to reduced biological activity and moisture availability, making it the correct choice.