Answer: B

Explanation:

Air humidity is one of the various forms of water in nature. The moisture in the atmosphere in the form of vapor is called humidity. The humidity of the air is expressed as relative humidity. Relative humidity is the amount of moisture in the air as a percentage that keeps the air in a saturated state at that temperature, that is, relative humidity is a combination of the actual humidity and how much more moisture can be in the air at that temperature. There is a ratio. Humidity is affected by the intensity of solar radiation, temperature, altitude, wind, vegetation and soil water level. High temperature increases the ability to absorb moisture from the air and reduces relative humidity. Low temperature, ability to absorb air moisture By reducing, the relative humidity increases. Hence, option (b) is correct. 

Answer: C

Explanation:

Bioluminescence is the ability of organisms to emit light. It is a part of organisms' adaptation for survival. Bioluminescent organisms are commonly found in marine environments, but they are also found on terrestrial environments. The color of light emitted by organisms depends on their chemical properties. Hence, statement 1 is correct.

Bioluminescence in some organisms helps protect them from predators. Bioluminescence attracts insects, which helps spread the spores. It may also be a mechanism to protect the organism from frugivorous (or fruit-eating) organisms. Hence, statement 2 is correct.

Answer: B

Explanation:

In Brazil in 1992 , world leaders failed to reach a consensus due to the strong stances of industrialized and developing countries on climate change and global warming. The United States has long sided with the need for scientific research on global warming and climate change, with business interests taking precedence over this global environmental issue. Hence, option (b) is correct.

Answer: C

Explanation:

The Myristica swamp treefrog is a rare arboreal species of the Western Ghats. Its scientific name is Mercurana myristicapalustris. It was first recorded north of Shencottah Gap in the Vazhachal Reserve Forest in Thrissur district of Kerala.

Answer: B

Explanation:

Water vapor is Earth's most abundant greenhouse gas. It is responsible for about half of the Earth's greenhouse effect. Hence, option (b) is correct.