Harappan cities were divide into two parts: the eastern part was larger but lower and called lower town; the western part was smaller but higher and were described as citadels. The walls of baked brick were built around each part with bricks laid in an interlocking pattern for stronger walls.

Muhtasib were the censor of morals imposed by Aurangzeb guided by an orthodox Sunni sect of Islam. The purpose of these censors was to purify Islamic practices.

● the tropical region lies very close to the equator; between 10°N and 10°S. So, it is referred to as the equatorial region.

● The river Amazon flows through this region. Numerous tributaries join the Amazon River to form the Amazon basin. The river basin drains portions of Brazil, parts of Peru, Bolivia, Ecuador, Columbia and a small part of Venezuela.

● the Amazon Basin stretches directly on the equator and is characterized by hot and wet climate throughout the year. Both day and nights are almost equally hot and humid. The skin feels sticky. It rains almost everyday, that too without much warning. The day temperatures are high with very high humidity. Atnight the temperature goes down but the humidity remains high. Hence option C is correct.

Source : Class 7 NCERT Geography book, ch- 8 , page 56-57.

• The Gobi Desert is a large desert region in Asia.
• It covers parts of northern and northwestern China, and of southern Mongolia. The Gobi desert is surrounded by the Altai Mountains and steppes on the north, by the Taklamakan Desert to the west, Tibetan Plateau to the southwest, and by the North China Plain to the southeast.
• The Gobi is a rain shadow desert.

• Tribes Advisory Council (TAC) has not been constituted in Karnataka.
• Part B, Para 4 of the Fifth Schedule of the Indian Constitution contains the provision for setting up the Tribes Advisory Councils in all States having Scheduled Area.
• Tribes Advisory Council (TAC) consists of twenty members. Out of whom, three-fourths are representatives of the Scheduled Tribes in the Legislative Assembly of the State. The council advises the Governor of the state on matters of the welfare and advancement of the Scheduled Tribes in the State.
  

Hence, Option C is correct.

• The annual Ganges River Dolphin census is being undertaken by Worldwide Fund for Nature-India in collaboration with the Uttar Pradesh Forest Department.

• Unlike previous years, when the direct counting method was used, this year the tandem boat survey method is being used.

• The animal is known to make strange sounds when it breathes, earning it the sobriquet 'Susu'.

• Being a mammal, it has to come to the surface to breathe.

• It is also called a blind dolphin because it does not have a crystalline eye lens and uses echolocation to navigate and hunt.

Darrah National Park in Rajasthan, India, is a national park established in 2004 consisting of three wildlife sanctuaries in Rajasthan. Hence, option D is correct.

Kalesar National Park- Haryana

Periyar National Park-Kerala

Manas National Park-Assam
Jim Corbett National Park- Uttarakhand

● The candela (cd) is the base unit of luminous intensity in the International System of Units (SI). The word candela is Latin for candle.

● Luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle.