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.
