Does 'These latter vast regions of forests, rivers, and mountains border the Indonesian state of Kalimantan and the oil-rich sultanate of Brunei.' offer a contrasting position to 'The region near the Indonesian border is flat and has sparse vegetation.'
These latter vast regions of forests, rivers, and mountains border the Indonesian state of Kalimantan and the oil-rich sultanate of Brunei.###The region near the Indonesian border is flat and has sparse vegetation.