Answer: Option C. -> more
:
C

The difference in air pressure between two places initiates the movement of air. More the difference in the air pressure, greater will be the speed of movement. Air moves from higher pressure to lower pressure region.

Answer: Option C. -> tornado
:
C

A dark funnel shaped cloud that reaches from the sky to the ground is called a tornado. A tornado is a violently rotating column of air that is in contact with both the surface of the earth and a cloud, or in rare cases, the base of a cloud. 

Answer: Option B. -> When there is a pressure difference between the regions.
:
B

The wind blows because of differences in air pressure between the two regions. The wind blows from the region of high pressure towards the region of low pressure. The speed of air depends on the difference in air pressure. More the difference more is the speed of blowing air.

Answer: Option A. -> eye
:
A

The center of the cyclone is known as an eye. The eye is a region of mostly calm weather which is at the center of strong tropical cyclones. It is a roughly circular area, typically 30–65 km (20–40 miles) in diameter. Eye is surrounded by the eyewall, which is a ring of towering thunderstorms where the most severe weather occurs.

Answer: Option B. -> The air pressure in the bottle is greater than the outside pressure.
:
B
As we press the bottle, the air pressure inside the bottle becomes more than the pressure outside. Thus, a paper ball kept near the mouth of the bottle will be pushed out due to this pressure difference.

Answer: Option C. -> The metal can gets crushed.
:
C
As soon as the water inside the can is heated, water starts converting to water vapour. On sealing the can, the water vapour inside cannot go out and pressure inside the can increases.
When cold water is poured on the can, the water vapour inside the can condenses into water. Thus, there is a drop in air pressure inside the can. The atmospheric pressure then pushes the can inwards, causing it to distort. This can be visualised from the diagram given below.

Answer: Option A. -> Indian Ocean
:
A
Southwest monsoon winds carries moisture from the Indian ocean because it is situated in the Southwest direction. These winds bring majority of the rainfall to India. 

Answer: Option B. -> It is an area of low pressure
:
B

The centre or eye of a tropical cyclone is the area of low pressure and is characterized by little or no wind. In severe cyclones, the eye usually shows up as a circular hole in the central cloud mass. The eye is usually about 40 km in diameter, but can vary from less than 10 km to more than 100 km.

Answer: Option B. -> Flood
:
A, B, and C

A natural event such as flood, earthquake, or hurricane that causes great damage or loss of life is called a natural disaster. It is a major adverse event which is resulted from the natural processes of the earth.
Rain is not a disaster but excess rain can cause flood.

Answer: Option A. -> Satellites
:
A

The use of satellites in disaster management is becoming more integral in reducing reaction time and providing accurate information for rescue and disaster control operations. Satellites are used in disasters for communication, remote sensing and mapping. Meteorological and storm warning satellite technology can help in predicting disasters and setting up precautionary activities.