The distribution of water on the Earth’s surface is extremely uneven .Onl
Answer:

Explanation:
Angular momentum, L = m v r
areal velocity = 
according to kepler's 2nd law

since, we know that

areal velocity= 
now substituting value of v in areal velocity we get

hence from above equation of rate of change of area swept i.e. areal velocity is proportional to 
The Niagara River is important to the people of the Northeast because it supplies power throughout the region via hydropower. It also helps the economy because of the tourism.
Answer: 1 - B
2 - A
3 - C
4 - D
Explanation: Hectare is a unit measurement for land, which is very commonly used and is expressed in square meters.
Land degradation refers to the loss of fertility of the soil.
Mangroves are the trees that are usually found in the inter-tidal coastal area such as wetlands.
Salinization is a process of adding salt to the soil, thereby making it difficult for the soil to hold water.
Thus, the correct answers are being matched.