The mode of transport traditionally used for carrying goods across hilly terrains in Mizoram is:

The correct answer is: b) Pack animals.

Pack animals are the traditional mode of transport for carrying goods across hilly terrains in Mizoram. They are used to carry a variety of goods, including food, clothing, and building materials. Pack animals are also used to transport people, especially in remote areas where there are no roads.

Bullock carts are not commonly used in Mizoram because the terrain is too hilly. Bicycles are also not a practical mode of transport because of the steep hills. Human porters are used in some areas, but they are not as efficient as pack animals.

Here are some additional details about each option:

• Bullock carts are a type of vehicle that is pulled by bullocks. They are used to transport goods and people over short distances. Bullock carts are not commonly used in Mizoram because the terrain is too hilly.
• Pack animals are animals that are used to carry loads. They include horses, donkeys, mules, and camels. Pack animals are the traditional mode of transport for carrying goods across hilly terrains in Mizoram. They are used to carry a variety of goods, including food, clothing, and building materials. Pack animals are also used to transport people, especially in remote areas where there are no roads.
• Human porters are people who carry loads on their backs. They are used to transport goods and people over short distances. Human porters are used in some areas of Mizoram, but they are not as efficient as pack animals.
• Bicycles are a type of vehicle that is powered by pedals. They are used to transport people over short distances. Bicycles are not a practical mode of transport in Mizoram because of the steep hills.