The trains in the stories symbolized the journey the characters underwent to get what they want.
The trains are also the witnesses to the death of the characters. In the story "Paul's case" Paul committed suicide by jumping in front of a train. In the story "A Journey" the husband died in his sleep inside the train while the wife accidentally died when the train reached its destination.
It also sends a message of whatever journey one enjoys in life, he/she will always end up dead or death is an inevitable destination.
Answer:
C.
Explanation:
Pycnocline is a layer in the oceanic body in which the density of water increases with the depth in the ocean. This change in density happens due to the changes in temperature and salinity of water.
<u>Other four words/phrases are related to the process of water purification. The only word which does not fit in the water purification process is Pychnocline. </u>
So, the correct answer is Option C.
