The correct answer is: c) Both animals and plants.
Prehistoric people in Assam likely hunted and gathered both animals and plants. This is because Assam is a region with a diverse range of ecosystems, including forests, grasslands, and wetlands. This diversity of ecosystems would have provided prehistoric people with a variety of resources to hunt and gather, including wild animals, fish, and plants.
Option a) is incorrect because it only mentions wild animals. While wild animals were certainly a source of food for prehistoric people in Assam, they would not have been the only source of food. Option b) is incorrect because it only mentions fish and aquatic resources. While fish and aquatic resources were certainly a source of food for prehistoric people in Assam, they would not have been the only source of food. Option d) is incorrect because it states that resources depended on the specific region. While this is true to some extent, it is important to remember that prehistoric people in Assam were able to travel long distances and access a variety of resources. Therefore, it is more likely that they hunted and gathered both animals and plants, regardless of the specific region.