Match the following :
(a) Ultraviolet Rays – (i) Bio-magnification
(b) Biodegradable – (ii) Eutrophication organic matter
(c) DDT – (iii) Snow blindness
(d) Phosphate – (iv)BOD

Question

Match the following :
(a) Ultraviolet Rays – (i) Bio-magnification        
(b) Biodegradable – (ii) Eutrophication organic matter        
(c) DDT – (iii) Snow blindness
(d) Phosphate – (iv)BOD

Accepted Answer

The given question asks us to match the items in column A with their corresponding descriptions in column B. The correct answer is provided as Option 3, which means we need to justify why this option is correct and explain why the other options are incorrect.

1. **Explanation for Option 3:**
   - **(A) Ultraviolet Rays (iii) Snow blindness:** Ultraviolet rays are a type of electromagnetic radiation that comes from the sun. Prolonged exposure to UV rays can cause snow blindness, which is a painful eye condition caused by the reflection of UV rays off snow and ice. This condition is similar to sunburn of the cornea and is a temporary form of blindness.
   - **(B) Biodegradable (ii) Eutrophication:** Biodegradable substances are those that can be broken down by natural processes. When organic matter, which is biodegradable, accumulates in water bodies, it can lead to eutrophication. This process involves the excessive growth of algae due to increased nutrients, often resulting from the decomposition of organic matter, leading to oxygen depletion in the water.
   - **(C) DDT (i) Bio-magnification:** DDT is a pesticide that is known for its persistence in the environment and its ability to bio-magnify. Bio-magnification refers to the process by which the concentration of a substance, such as DDT, increases in the tissues of organisms at each successive level of the food chain.

2. **Explanation for why other options are incorrect:**
   - **Option 1:**
     - (A) Ultraviolet Rays (i) Bio-magnification: This is incorrect because ultraviolet rays do not accumulate in organisms and do not undergo bio-magnification.
     - (B) Biodegradable (iii) Snow blindness: This is incorrect because biodegradable substances do not cause snow blindness.
     - (C) DDT (ii) Eutrophication: This is incorrect because DDT is not directly related to eutrophication; it is more associated with bio-magnification.
   - **Option 2:**
     - (A) Ultraviolet Rays (ii) Eutrophication: This is incorrect because ultraviolet rays do not cause eutrophication.
     - (B) Biodegradable (i) Bio-magnification: This is incorrect because biodegradable substances do not bio-magnify; they break down naturally.
     - (C) DDT (iii) Snow blindness: This is incorrect because DDT does not cause snow blindness; it is a chemical pesticide.

By following the instructions and focusing on the given correct answer, Option 3 is justified as the correct match for the items and their descriptions.