The correct answer is: b) The southern Chota Nagpur Plateau region.
The southern Chota Nagpur Plateau region is the most forested region in Bihar, accounting for over 60% of the state’s forest cover. The region is home to a variety of forest types, including tropical moist deciduous forests, tropical dry deciduous forests, and tropical evergreen forests. The forests of the southern Chota Nagpur Plateau region are important for a number of reasons, including their role in providing habitat for wildlife, their contribution to the state’s economy, and their role in protecting the environment.
The northern plains of Bihar are a relatively dry region, with a low annual rainfall. This makes it difficult for forests to grow in this region. The eastern border areas of Bihar are also a relatively dry region, and they are also home to a number of human settlements. This makes it difficult for forests to grow in this region. Along the major rivers of Bihar, there are a number of human settlements and agricultural areas. This makes it difficult for forests to grow in this region.
The southern Chota Nagpur Plateau region is a relatively wet region, with a high annual rainfall. This makes it ideal for the growth of forests. The region is also relatively sparsely populated, which gives forests the space they need to grow. The southern Chota Nagpur Plateau region is also home to a number of protected areas, which help to protect the forests from human activities.