What is the tundra’s permanently frozen layer of ground called? permafrost
soil frost
ground layer
active soil

permafrost

Explanation:

The arctic soil is so cold that the ground beneath the tundra surface remains frozen all year. This permanently frozen ground is called permafrost. Each summer, when the sun warms the tundra surface, the top few inches of soil thaw.

convergent boundaries: where two plates are colliding. subduction zones occur when one or both of the tectonic plates are composed of oceanic crust.

divergent boundaries – where two plates are moving apart.

transform boundaries – where plates slide passed each other.

explanation:

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