Answer: Option A. -> Afghanistan
Answer: (a)

Answer: Option D. -> 10:00 hrs, Monday
Answer: (d)

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

Answer: Option B. -> earthquake
Answer: (b)
The epicentre is the point on the Earth’s surface that is directly above the hypocenter or focus, the point where an earthquake or underground explosion originates.
In the case of earthquakes, the epicentre is directly above the point where the fault begins to rupture, and in most cases, it is the area of greatest damage.
However, in larger events, the length of the fault rupture is much longer, and damage can be spread across the rupture zone.

Answer: Option B. -> Day and night are of equal length
Answer: (b)
An equinox is an astronomical event in which the plane of Earth’s equator passes through the centre of the Sun, which occurs twice each year, around 20 March and 23 September.
On an equinox, day and night are of approximately equal duration all over the planet. They are not exactly equal, however, due to the angular size of the sun and atmospheric refraction.

Answer: Option A. -> 21 June
Answer: (a)

Answer: Option B. -> Gneiss
Answer: (b)

Answer: Option D. -> Valleys of Karst region — Dunes
Answer: (d)Dunes are features associated with wind deposition. Dunes are infact hills of sand formed by the accumulation of sand and shaped by the movement of winds.

Answer: Option A. -> Underground water
Answer: (a)
Even though most of the Earth's surface is water, only 1% of it is fresh usable water. Ninety-seven per cent of the Earth's water is saltwater, which contains too many minerals for humans to use untreated.
Two per cent of our water is 'locked up' in ice caps and glaciers, leaving only one per cent as usable freshwater. Groundwater comprises 0.62 per cent of water, followed by Freshwater Lakes: 0.009 per cent; and rivers: 0.0001 per cent.

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