The correct answer is: B. Tropical moist deciduous forests.
Tropical moist deciduous forests are the most abundant forests in Bihar. They are found in the southern and eastern parts of the state. These forests are characterized by a dry season and a wet season. The trees in these forests shed their leaves during the dry season. The main trees found in these forests are sal, teak, and bamboo.
Tropical dry deciduous forests are found in the northern and western parts of Bihar. These forests are characterized by a long dry season and a short wet season. The trees in these forests do not shed their leaves during the dry season. The main trees found in these forests are khair, babul, and dhok.
Plantations are forests that have been planted by humans. They are found in all parts of Bihar. The main trees planted in these forests are teak, sal, and bamboo.
Tropical evergreen forests are not found in Bihar. These forests are found in the hilly areas of the Western Ghats and the Eastern Himalayas. They are characterized by a high rainfall and a warm climate. The trees in these forests do not shed their leaves. The main trees found in these forests are ebony, mahogany, and rosewood.