(B) (iv)
Organic farming does not damage the environment; statements (i), (ii), and (iii) all describe practices that increase waste or non-biodegradable material, harming the environment.
The textbook explicitly states that improved lifestyles → more waste (i), disposable items (ii), and non-biodegradable packaging (iii) all negatively impact the environment. Organic farming, however, avoids synthetic chemicals and is an environment-friendly practice. The examiner expects students to identify that only option (iv) is harmless/beneficial.