To solve the food problem of the country,which among the following is necessary?

Vividha told Vasudha that she will show her some magic. Vividha took a metallic pipe. She asked Vasudha to hold one of its ends close to her ears. She gently tapped the other end of the pipe with a metallic object. She asked Vasudha what she heard. Vasudha said she heard two sounds.
$(a)$ Was this magic? Why did Vasudha hear two sounds?
$(b)$ What values are imbibed by Vividha?

Match the following Column $A$ and Column $B$:

Column $A$	Column $B$
$(a)$ Cattle used for tilling and carting	$(i)$ Milk producing female
$(b)$ Indian breed of chicken	$(ii)$ Broiler
$(c)$ Sahiwal,Red Sindhi	$(iii)$ Draught animals
$(d)$ Milch	$(iv)$ Local breed of cattle
$(e)$ Chicken better fed for obtaining meat	$(v)$ Aseel

Arrange these statements in the correct sequence for the preparation of green manure.
$(a)$ Green plants are decomposed in the soil.
$(b)$ Green plants are cultivated for preparing manure or crop plant parts are used.
$(c)$ Plants are ploughed and mixed into the soil.
$(d)$ After decomposition,it becomes green manure.

Mention two ways of obtaining fish.

Which one is not a source of carbohydrate?