Solution:
Operation Flood refers to White revolution. Operation Flood was started by National Dairy Development Board (NDDB) in 1970s. The objective of this programme was to create a nationwide milk grid. The result was that India became the largest producer of Milk and Milk Products. Operation flood is called White Revolution of India.

Solution:
Sal' is a very important tree of Tropical dry deciduous forest. These “dry” forests occur in regions with heavy rainfall for part of the year followed by a marked dry season. They are dense with greenery during the wet summers, but become a starkly different landscape during the dry winters when most trees shed their leaves.

Solution:
Mahagony is not a species of tropical moist deciduous forests. Mahogany is a straight-grained, reddish-brown timber of three tropical hardwood species of the genus Swietenia, indigenous to the Americas and part of the pantropical chinaberry family, Meliaceae.

Solution:
0.35% of Indian terrain receive annual rainfall below 75 cm. The proportion of area which receives annual rainfall less than 75 cm. is one third. Major part of country included in this proportion are subtropical arid and subtropical semi arid regions of India. e.g. Gujarat, Rajasthan, parts of Punjab

Solution:
The monsoon is caused by the seasonal reversal of winds. During summer, landmasses tend to heat up more quickly than oceans, creating a low-pressure area over the land. Meanwhile, oceans retain their relatively cooler temperatures, creating a high-pressure area. This pressure gradient causes winds to blow from the ocean towards the land, bringing moisture-laden air. This is known as the summer monsoon. In winter, the situation reverses. Landmasses cool down more rapidly than oceans, creating a high-pressure area over the land and a low-pressure area over the ocean. This reversal in pressure causes winds to blow from the land towards the ocean, leading to the winter monsoon. Option A: Temperature changes While temperature changes are a factor in monsoon dynamics, the primary cause of the monsoon is the seasonal reversal of winds, not just temperature changes. Option C: Humidity difference Humidity difference plays a role in the monsoon, but it's not the primary cause. The direction of the winds, influenced by pressure differences, is the key factor in the monsoon phenomenon. Option D: Pressure differences Pressure differences indeed play a crucial role in causing monsoons. The seasonal reversal of winds is a result of pressure differences between landmasses and oceans, leading to the monsoon phenomenon. Therefore, the correct answer is option B: Seasonal reversal of winds.

Solution:
The withdrawal of monsoon from the northern region and then from the whole nation gradually is termed as monsoon retreat. During the monsoon retreat it rains heavily in Odisha and Andhra Pradesh as cyclonic formation in Baengal are confined to this region.

Solution:
Mangrove forests grow in waterlogged regions in the intertidal zones of coastal regions. They face tides every day and water level keeps on fluctuating. Mangrove forests have strong roots and the belt of these trees protects the coastal areas from disaster such as cyclone.