Answer: B

Explanation:

Water vapour is also a variable gas in the atmosphere, which decreases with altitude. In the warm and wet tropics, it may account for four percent of the air by volume, while in the dry and cold areas of desert and Polar Regions; it may be less than one percent of the air. Water vapour also decreases from the equator towards the poles. It also absorbs parts of the insolation from the sun and preserves the earth's radiated heat. It thus, acts like a blanket allowing the earth neither to become too cold nor too hot. Water vapour also contributes to the stability and instability in the air. Hence, statement 1 is incorrect.

Answer: A

Explanation:

Lagoon lakes in Kerala are known as Kayals. Kayal (Back Water) is a special feature of the Malabar Coast, which is used for fishing and inland sailing. The Kerala backwaters are a network of brackish lagoons and lakes. 'Every year in Kerala, the famous Nehru Trophy Vallabhakali (boat race) is organized at 'Punnamada Kayal'. Hence, statement 1 is incorrect and statement 2 is correct.

Answer: C

Explanation:

Generally, the height of the peninsular plateau decreases from west to east, which is evidenced by the direction of flow of the rivers here. Black soil is mainly found in the western and north-western parts of this plateau. Hence, both statements 1 and 2 are correct.

Answer: B

Explanation:

Lakshadweep, located off the Malabar coast of Kerala, is made up of small coral islands. Earlier they were known as Laccadive, Minicoy and Amindivi. In the year 1973, it was named Lakshadweep. Kavaratti Island is the administrative headquarters of Lakshadweep. Many types of plants and animals are found on this island group. Pitali Island, located in the Lakshadweep group, where there is no human habitation, has a bird sanctuary. Hence, option (b) is the correct answer.

Answer: C

Explanation:

The eastern coastal plain is wider and more elevated than the western coastal plain. The rivers flowing towards the east and falling into the Bay of Bengal form long deltas here. Hence, statement 1 is the correct answer.

It includes the deltas of Mahanadi, Godavari, Krishna and Kaveri. Due to the raised coast, there are less ports and harbors here. The width of the continental shelf here is 500 kilometers, due to which the development of ports and harbors here is difficult. Hence, statement 2 is correct.