At which type of boundary does tension often occur?
a.) convergent
b.) divergent
c.) subduction
d.) transform

Option (B)

Explanation:

In a divergent plate boundary, two plates moves in opposite direction. It is due to the tensional force. This tensional forces stretches the two plates apart, as a result of which the sea floor spreading takes and new materials are added along the mid oceanic ridge. This mid oceanic ridge marks the boundary between the two diverging plate. The rocks at this ridge are the youngest and as one moves away from this ridge, older rocks are found.

Thus, the correct answer is option (B).

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