Tundras are very cold and harsh. They have no trees and little vegetation, although there may be wildflowers in the summer, due to indirect sunlight. There is barely sufficient rainfall and the climate is often windy. Animals include caribou, birds, polar bears, wolves and arctic foxes (to name a few).
Answer:
B. The presence of an earthquake belt.
Explanation:
A rift valley only happens when the plates are diverging. A trench represents plates converging. And the presence of active volcanoes is only on converging and some diverging boundaries (hence there is no volcanoes in California). An earthquake is present in all plate boundaries.

↦<u>N</u><u>a</u><u>t</u><u>u</u><u>r</u><u>a</u><u>l</u><u> </u><u>Resources</u><u> </u>are resources like water, air, coal etc. that exist on Earth without an kind of interference by humans. They are highly essential as they support life & the needs of different organisms.
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B- Water Cycle will be the answer.