2a
An equinox is a day when the sun is in its zenith over the Equator, and the Earth experiences days and nights of generally equal length. 


3b

1Plateaus are very important to man because they are rich in mineral deposits as a result of these mineral deposits, many of the mining areas in the world are located where there are plateaus.

2Plateaus are very good sources of minerals such as Iron, copper, gold, diamonds, Manganese, coal, etc.

3Areas that have plateau also have waterfalls as river falls from a great height of the plateau

4Although plateaus are not very good for agricultural activities due to hard rock formation, hence, agricultural activities can be carried out at the base of the plateau where lava soils have deposited.

(7a)

Environmental problems or hazards are disasters which affects lives and properties as a result of the action of man and other natural phenomenon.

7b)
i)Flooding
ii)Desert Encroachment
iii)Drought
iv)Soil Erosion 
v)Deforestation

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