Question

what term is used to describe a phenomenon in which pests become resistant to a pesticide over time – making farmers apply more and more pesticide each time they spray? chlorinated hydrocarbons pesticide treadmill

Explanation:

To determine the correct term, we analyze the options:

• "Chlorinated hydrocarbons" are a type of chemical compound, not a phenomenon related to pest resistance over time.
• "Pesticide treadmill" refers to the cycle where pests develop resistance to pesticides, forcing farmers to use more (and often stronger) pesticides, which matches the described phenomenon.

Answer:

B. Pesticide treadmill (assuming the options are labeled with A for Chlorinated hydrocarbons and B for Pesticide treadmill as per typical multiple - choice formatting, with the full options being: A. Chlorinated hydrocarbons, B. Pesticide treadmill)