In which forest type is the Sundari tree a major example?

Correct answer: Mangrove forest

The Sundari is a characteristic tree of mangrove vegetation. Mangroves grow in muddy, saline, and frequently waterlogged coastal areas, especially around river deltas and tidal creeks. The Sundari tree is strongly associated with the Sundarbans, a famous mangrove region of the Ganga-Brahmaputra delta. Therefore, option B is correct. Thorn forests occur in dry areas, alpine forests occur at high mountain elevations, and coniferous forests contain needle-leaved trees in cooler uplands. None of those environments provides the typical conditions for the Sundari tree.

The reasoning depends on matching the tree with its natural habitat. Sundari trees tolerate salty water and soft tidal mud, which are defining conditions of mangrove forests. The name also provides a useful memory link with the Sundarbans, although the habitat evidence is the real geographical reason. Thus, the tree should not be classified by the dry, cold, or mountainous forest types in the other choices. Option B accurately identifies the vegetation type.