Answer: Option C. -> Venezuela
Answer: (c)

Answer: Option D. -> 4 3 2 1
Answer: (d)

Answer: Option D. -> 2 3 4 1
Answer: (d)

Answer: Option D. -> Australia
Answer: (d)

Answer: Option C. -> Tree plantation/afforestation
Answer: (c)Soil erosion in a desert region can be checked by tree plantation and afforestation.

Answer: Option B. -> Saar - Iron-ore
Answer: (b)

Answer: Option A. -> Fallowing
Answer: (a)
Fallowing, in agriculture, is the mode of preparing the land, by ploughing it a considerable time before it is ploughed for seed.
As a result of fallowing, parts of the soil become better incorporated, and thus reciprocally ameliorated; so that they may afford more uniform nourishment to the roots of plants

Answer: Option D. -> Grass
Answer: (d)
Bamboo a subfamily (Bambusoideae) of flowering perennial evergreen plants in the grass family Poaceae. Giant bamboos are the largest members of the grass family.
The woody bamboos share characteristics with herbaceous (non-woody) grasses, notably leaf blades that have a distinctive internal organization of the tissues and which are basally narrowed to form a stalk-like connection with the leaf sheath.

Answer: Option A. -> 3 4 2 1
Answer: (a)

Answer: Option C. -> Copper - Arizona
Answer: (c)