Deciduous and thorn forests both save water yet which difference is correct?

Correct answer: Deciduous shed leaves while thorn forests have thorns and small leaves

Deciduous and thorn forests can both reduce water loss, but they do so through different visible adaptations. Deciduous trees commonly shed their leaves during a dry or unfavourable season. This reduces the surface through which water is lost. Thorn forests are associated with dry conditions and commonly contain plants with spines and very small leaves, which reduce transpiration and help protect stored moisture.

Option B is correct because it gives the appropriate distinction: deciduous plants shed leaves, while thorny vegetation has thorns and small leaves. The other choices describe tidal, alpine or unrelated conditions. It is important not to treat all water-saving adaptations as identical. The forest type can often be recognised by observing whether the main response is seasonal leaf fall or reduced leaf area and thorn development.