1/4 and 5/12 as a common denominator

The first passage describes about the nostalgic tone.

Explanation:

In the first passage author describes where he used to live , he also describes that his hometown had a railway station, although India was riddled with train lines but rail lines did not run through every single village or town.

The second passage describes about the critical tone.

Explanation:

In the second passage the author describes how broadband connection helped to quickly refresh as well as zoom the images but then also author used to face difficulty.

The third passage describes about the pleading tone.

Explanation:

In the third passage author was zooming picture and was eager to know regarding a station . When author zoomed the name , it was Burhanpur , by seeing the name the author became emotional.