A convergent boundary is a location where tectonic plates move toward each other. which feature of the ocean floor is caused by one tectonic plate moving under another at a convergent boundary a. a flat plain
b. a trench
c. a mid-ocean ridge
d. a continental shelf

At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.

Explanation:

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up