Q. Which one of the following is the most productive ecosystem?

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Solution:

The tropical rainforest shows maximum diversity and also maximum productivity. More solar energy and resources are available in tropics which promotes higher productivity. On land, the maximum primary production rate is found in tropical rainforests followed by tropical deciduous forests, temperate forests, savannah, temperate grasslands and desert scrub.
The reason behind it is the availability of a good amount of rain, nutrient and sunlight. It is the most regulated type of ecosystem, and it is much functional than other ecosystems.