$A$ little baby was playing in a park with his maid. Suddenly,he fell down and got a minor injury. The maid applied tincture of iodine on the wound.
$(a)$ Why did she apply tincture of iodine on the wound?
$(b)$ Name the solute and solvent present in tincture of iodine.
$(c)$ Enlist the values shown by the maid.

Unpredictable monsoon,droughts,and low rainfall are adversely affecting Indian agriculture.
$(a)$ Mention any two initiatives that have been adopted to increase the availability of water for agricultural purposes.
$(b)$ State two advantages of making check dams.
$(c)$ Briefly describe the canal and river lift systems of irrigation.

Which of the following are Indian cattle?
$(i)$ Bos indicus
$(ii)$ Bos domestica
$(iii)$ Bos bubalis
$(iv)$ Bos vulgaris

Which one of the following nutrients is not available in fertilizers?

Freshwater resources include canals,ponds,reservoirs and rivers.

When Ashok visited his village,he observed that villagers were suffering from malnutrition. To curb malnutrition in the village,he suggested they select five or six fish species in a pond. This increased the fish yield from the pond. The villagers were surprised to see the results and asked him to help with the other two ponds in the village.
$(i)$ What name is given to this intensive fish farming?
$(ii)$ Write the basis on which the different fish species are selected.
$(iii)$ Ashok's initiative is worth praising. Give two reasons.