Which geologic feature is most likely to form at a mid-ocean ridge: peninsula, volcano, delta, or plateau?

The answer is: volcano.

Explanation:

The mid-ocean ridges are underwater elevations located in the middle part of the Earth's oceans.

The chain has a very rugged relief, with wide slopes and ridges often marked by a deep longitudinal recess, called the sinking or rift valley, along which numerous surface earthquakes and volcanic eruptions occur that pour basalt lavas.

The answer is: volcano.

d eras and periods

because if the tool that you are using is not balanced it there would be false mass.