What goes through cities and fields, but never moves?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

What Deficiency does the below rebus represent?

VIT_MIN

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

In a particular village, only two barbershops exist.

The first shop has a handsome barber with a neat haircut who is handsomely dressed in clean clothes and is extremely humble with his body language. The place is clean and looks hygienic.

In the second shop, you can find a barber with shabby clothing. His hairs are weirdly cut and his clothes still have the stains from last night's dinner. The place is not clean as well and reeks a bit.

You visit the village for the first time and decide to get your haircut. Which barbershop will you like to go for that and why?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?