1) The "Ring of Fire" is an area along the edge of the Pacific Ocean with many volcanoes. Most of
the volcanoes are formed as a result of one tectonic plate. Which of these geological areas is where
rock is recycled by one tectonic plate sliding underneath another tectonic plate?
A. Rift valley
B. Strike-slip fault
C. Subduction zone
D. Divergent boundary

The geological area is where rock is recycled by one tectonic plate sliding underneath another tectonic plate is C. Subduction zone.

Explanation:

A Rift Valley is a large elongated depression with steep walls formed by the downward displacement of a block of the Earth’s surface between nearly parallel faults or fault systems.

A strike-slip fault is a fault in which rock strata are displaced mainly in a horizantal direction, parallel to the line of the fault.

A divergent boundary is a linear feature in that exists between two tectonic plates that are moving swat from each other.

A subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle. Regions where this process occurs add known as subduction zones.

so your answer is C.