Potential archaeological sites in Mizoram that might provide clues about prehistoric life could be:

The correct answer is: d) All of the above

Caves and rock shelters provide a sheltered environment that is ideal for the preservation of artifacts and fossils. River terraces are formed by the erosion of river banks, and can contain evidence of past human activity, such as tools and pottery. Hilltops are often used as settlement sites, as they offer good visibility and protection from flooding.

Here are some additional details about each option:

• Caves and rock shelters: Caves and rock shelters have been used for habitation by humans for thousands of years. They provide a sheltered environment that is ideal for the preservation of artifacts and fossils. Some of the earliest evidence of human habitation has been found in caves and rock shelters.
• River terraces: River terraces are formed by the erosion of river banks. As the river erodes the bank, it leaves behind a series of step-like terraces. These terraces can contain evidence of past human activity, such as tools and pottery. River terraces are often used as agricultural land, as they are well-drained and have good access to water.
• Hilltops: Hilltops are often used as settlement sites, as they offer good visibility and protection from flooding. Hilltops are also often used as religious sites, as they are seen as being closer to the gods.