In your opinion, which is the most effective way to conserve the plant diversity of an area?

Explanation

Biosphere reserves are multipurpose protected areas of different representative ecosystems that are meant for the conservation of biodiversity or wildlife, the traditional lifestyle of tribals and their domesticated animals, and plant resources. Each biosphere reserve has a core zone (where no human activity is allowed), a buffer zone (with limited human activity), and a manipulation zone (where human activity is allowed without degradation of ecology). Thus, the biosphere reserves protect not just wild varieties but also domesticated varieties of plants in an area.