What does 3 r indicate in grid square 5618?

1. 3 r is the height of the dry tank
2. 3 r is the relative depth of the tank
3. 3 r means relative height of the dry tank is 3m
4. It means the height of the tank is 3m

(a) What does Aqueduct in grid square 2201?

1. An artificial canal
2. An artificial channel for conveying water typically in the form of a bridge across a valley
3. A perennial canal
4. A water channel supplying water through an artificial canal

(b) The given map extract receives seasonal rainfall because of

1. Flat land
2. Broken ground
3. Uncultivable land
4. White patch of land

What is the occupation of the people other than farming in grid square 5723 and 5724?

1. Trade
2. Sheep rearing
3. Working on the canal construction site
4. None of the above

Define Contour.