DDT is

The correct option is "Non-Biodegradable pollutant".

Explanation:
DDT (Dichlorodiphenyltrichloroethane) is a synthetic organochlorine insecticide. A pollutant is classified based on whether it can be broken down by biological processes or not:

1. Biodegradable pollutants: These are substances that can be decomposed, broken down, or decayed by micro-organisms (like bacteria and fungi) over time into simpler, non-toxic substances. Examples include agricultural waste, paper, and wood.

2. Non-biodegradable pollutants: These are substances that cannot be broken down or decomposed by natural agents or micro-organisms. Consequently, they persist in the environment for a very long time, accumulating in the ecosystem and food chains (a process known as biomagnification).

Since DDT is highly resistant to environmental degradation and does not decompose naturally, it remains in the soil and water bodies for decades, making it a classic example of a non-biodegradable pollutant.