Question

The aquatic fern which is an excellent biofertilizer is​

Answer 1

Answer:

azolla pinnata

Explanation:

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Answer 2

Answer:

Azolla pinnata is an aquatic plant, frond floating upon the surface of the water. It grows in quiet and slow-moving water bodies because swift currents and waves break up the plant. It is a good biofertilizer.

Pteridium aquilinum, also known as "eagle fern," is a species of fern occurring in temperate and subtropical regions in both hemispheres. It is not used as biofertilizer.

Marsilea is a genus of approximately 65 species of aquatic ferns of the family Marsileaceae. It is not used as biofertilizer.

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