Legume plants are important for the atmosphere because they are

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Help in fixation

Do not help in fixation

Increase soil fertility

Help in fixation

answer is D.

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Detailed Solution

Concept- Fabaceae is a family that includes plants that are legumes. In what is referred to as "root knobs," they have bacteria in their roots.
The legume refers to any plant from the Fabaceae family that contains its leaves, stems, and pods. The pulse is the edible seed provided by a legume plant. Pulses include beans, lentils, and peas. For example, a pea pod is a legume, but the pea inside the pod is the pulse. These Rhizobial bacteria can absorb nitrogen gas from the soil and convert it to plant-usable ammonia or nitrate. This grip is referred to as a nitrogen addiction. Rhizobia and vegetables form a beneficial partnership that improves the soil's fertility.
Hence, the correct answer is option 4.

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