251. The main source of usable water on the Earth is –
A. Oceans
B. Rivers
C. Underground water
D. Precipitation
✅ The correct answer is option C.
Physical Geography
252. The highest grade and best quality coal is –
A. Lignite
B. Peat
C. Bituminous
D. Anthracite
✅ The correct answer is option D.
253. Great Barrier Reef”, the world’s largest Coral reef is located in –
A. Caribbean Islands
B. Australia
C. Philippines
D. Indonesia
✅ The correct answer is option B.
254. Alluvial soils are rich soil for crop cultivation but are poor in–
A. humus
B. nitrogen and humus
C. organic material
D. inorganic material
✅ The correct answer is option B.
255. In which region is Terrace farming done?
A. Dry regions
B. Slope of hills
C. Mountain tops
D. Rooftops
✅ The correct answer is option B.
256. With what bio-region is the term Steppe associated?
A. Grasslands
B. Tropical forests
C. Savanna
D. Coniferous forests
✅ The correct answer is option A.
257. Which of the following is a Bio-logical method of soil conservations?
A. Contour fanning
B. Contour terracing
C. Gully control
D. Basin listing
✅ The correct answer is option A.
258. The primary goal of planning for disasters is to reduce –
A. Death
B. Damage
C. Risk
D. Vulnerability
✅ The correct answer is option D.
259. Contour line is the imaginary line joining places of equal :
A. Rainfall
B. Humidity
C. Elevation
D. Temperature
✅ The correct answer is option C.
260. Why the Earth is having its own atmosphere?
A. Winds
B. Clouds
C. Gravity
D. Rotation of the Earth
✅ The correct answer is option C.