Differentiate between mixed cropping,intercropping,and crop rotation.

Freshwater resources include canals,ponds,reservoirs and rivers.

Balwinder was a small farmer. As his field was rain-fed,he could not take the risk of growing specialized crops. He used to mix the seeds of two crops and sow them in the field. Kaku,his son who passed class $IX$,suggested growing two or more crops simultaneously in a definite pattern. Balwinder followed this,and the productivity per unit area increased.
$(i)$ Name the cropping pattern which Balwinder used earlier and the one suggested by Kaku.
$(ii)$ Write two advantages of practicing the pattern suggested by Kaku.
$(iii)$ Write two values displayed by Kaku.

Weeds affect the crop plants by:

It is observed that the number of asthmatic patients is increasing day by day. It is due to urbanization,industrialization,and excessive use of vehicles. Sidak's mother took some initiatives to reduce this problem. She,along with her son and his friends,prepared data on the destinations colony people visit,the different routes taken,and the timings of their jobs,and arranged for carpooling.
$(a)$ Explain the reason for the growing number of asthmatic patients.
$(b)$ Explain the values shown by Sidak's mother.
$(c)$ Suggest other methods to reduce this problem.

Which one of the following species of honey bee is an Italian species?