Why are trees planted along the roads?
(A) To make roads beautiful
(B) To reduce noise pollution
(C) To provide shade
(D) All of the above

Hint
We know about a lot of advantages of trees. There are aesthetic reasons, there are environmental reasons, there are personal reasons as they provide us with so many things. We see that there are multiple options fitting here.

Complete step by step answer
We have seen trees planted on both sides of the road. People often plant trees nearby their homes, in parks and various other places. Trees play a very crucial role in our lives. It only enhances the beauty of a place instead of providing shade to animals and other living organisms. It also reduces noise pollution.
Noise pollution: it is also known as sound pollution. When unwanted sounds are produced then it is known as noise pollution. It can lead to serious health issues.
Vehicles on the road produce much sound.
- It can lead to loss of hearing and damage ears.
- One cannot take a proper nap.
- High sound vibrations can lead to heart problems.
- It can lead to stress and fatigue.
In fact, a lot of harmful gases are also produced by vehicles running on roads. This leads to air pollution as well.
Trees reduce these problems.
Hence, the correct option is (D) I.e. all of the above.

Note
Maybe option (A) doesn’t look like an option that should come in a physics question. This might confuse someone. But we know that
- elastic bodies absorb vibrations which support option (B).
- Moving vehicles heat up which can be reduced by shade and this point support option (C).
These options look more like “physics” type options. But now since we know for sure that option (B) and (C) are correct. Option (D) is the only one that gives us a chance to select both these options. Which means that only option (D) is correct.