Final answer:
A diluted pesticide is a solution, not an EC, suspension, or a concentrate. It is created by adding solvent to reduce the concentration of the active ingredient for safer agricultural use.
Step-by-step explanation:
A diluted pesticide is a solution in which a solvent, usually water, is added to a measured portion of a more concentrated pesticide. This process decreases the concentration of the active ingredient, making it safer and more appropriate for application on crops.
In this context, dilution is the act of adding more solvent to decrease the concentration of the solute (pesticide) in the solution.
Choosing from the given options, a diluted pesticide is not an emulsifiable concentrate (EC), nor is it a suspension where particles would settle over time, and it is certainly not more concentrated.
Hence, the correct answer is (d) solution. A solution is a homogeneous mixture that appears clear, whereas a suspension has particles that are visible and can settle to the bottom.