Which is adapted for aquatic habit

  • A

    Aldrovenda

  • B

    Vallisneria

  • C

    Sancatia

  • D

    All of these

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$R$ : It is the occurrence of horizontal zonation in the ecosystem.

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$A$ : Agriculture and aquacultures are man maintained ecosystems.

$R$ : All biotic and abiotic factors are managed by humans in these ecosystems.

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