Which of the following trees is dangerous for environment ?

Eucalyptus is often referred to as an "ecological terrorist" or an environmental hazard in non-native regions like India. Its primary negative impacts include:

• High Water Consumption: It has a very high transpiration rate and deep taproots that significantly deplete groundwater levels, often causing nearby wells and water bodies to dry up.
• Allelopathy: The tree releases allelochemicals from its leaves and roots that inhibit the germination and growth of other native plant species, leading to a reduction in local biodiversity.
• Soil Degradation: It consumes large amounts of nutrients without returning significant organic matter to the soil.

In contrast, Neem and Babool (Acacia nilotica) are ecologically beneficial native species, and Banana is a herbaceous plant with no such invasive or water-depleting characteristics.