Which of the following best explain(s) the rationale for protecting mangrove ecosystems in the context of climate resilience?1.Mangroves reduce tidal energy and store freshwater, making them ideal sites for paddy cultivation in saline estuarine belts.2.Their salt-sensitive roots filter seawater, making mangroves key to converting coastal land into freshwater aquaculture zones.3.By withstanding tidal surges and offering biomass resources, mangroves function both as natural bio-shields and livelihood bases for rural communities. Select the answer using the code given below:

1. A

   1 only

   (a) 1 only: This option claims that statement 1 alone explains the rationale. Statement 1 is incorrect because mangroves do not store freshwater to facilitate paddy cultivation; rather, they exist in saline environments where specialized adaptations are required, and converting mangrove swamps into paddy fields destroys their ecological integrity.

2. B

   1 and 2

   (b) 1 and 2: This option claims statements 1 and 2 are correct. Statement 2 is incorrect because mangrove roots are not salt-sensitive (they are highly salt-tolerant via ultra-filtration and salt excretion mechanisms) and they are not used to convert coastal land into freshwater aquaculture zones.

3. C

   2 and 3

   (c) 2 and 3: This option includes statement 2, which is factually flawed regarding the salt-sensitivity of mangrove roots and the conversion of land into freshwater aquaculture.

4. D

   3 only

   (d) Official key: 3 only. Statement 3 is correct because mangroves act as natural bio-shields that dissipate wave and tidal energy, protecting coastal regions from surges, while also providing wood, fisheries, and other biomass resources that support local coastal livelihoods. Summary. Official key is (d) because statement 3 accurately captures the dual ecological and socio-economic role of mangroves as natural coastal bio-shields and livelihood providers, whereas statements 1 and 2 rely on scientifically incorrect premises regarding freshwater storage and salt sensitivity.

Summary. Official key is (d) because statement 3 accurately captures the dual ecological and socio-economic role of mangroves as natural coastal bio-shields and livelihood providers, whereas statements 1 and 2 rely on scientifically incorrect premises regarding freshwater storage and salt sensitivity.