One characteristic feature of tundra is that only the surface thaws in the summer and refreezes in the winter, leaving a layer of permanently frozen subsoil. This characteristic is known as

The appropriate answer is "Permafrost ".

Explanation:

Permafrost seems to be similar to other types of soil as well as the rock that has been managed to hold together with some ice.

explanation:

the president, prime minister, chief justice, speakers and ministers take their oath of office. the oath is taken in bengali

those who allied with france gained land and power.